The Humanization of Pet Names: Luna, Charlie, and What It Means

Fido is almost extinct. Not the dog — the name. In New York City dog licensing data, Fido has become so rare that dogs named Theodore or Stanley appear with greater frequency. The name that was once synonymous with domestic dogs across generations of American culture has essentially vanished, replaced by names that would have seemed strange applied to an animal not very long ago: Luna, Bella, Max, Charlie, Daisy. Names that are, quite simply, human names.

What happened to Fido is not a trivial shift in aesthetic preference. It is one of the clearest signals in cultural data that Americans stopped thinking about dogs — and increasingly about cats, rabbits, and other companion animals — the way they used to think about pets.

The Fido-to-Luna Transition: What the Data Shows

The traditional pet name canon had its own internal logic. Rex (Latin for king) was aspirational and martial — the dog as loyal guardian. Spot and Patches were descriptive — the dog named for its appearance, like a farmer naming livestock by their markings. Fido comes from the Latin fides, meaning faithful — a name that described the animal's function and virtue in relation to the human. Rover implied a working dog's freedom of movement. These names belonged to a conceptual framework in which dogs were companions, certainly, but companions of a specific kind: creatures who served human purposes and were valued for doing so.

Luna does not serve that framework. Luna is a human name — or rather, a name now equally distributed between humans and dogs. In the NYC licensing dataset that underlies NamesPop's pet names section, Luna has consistently ranked among the very top dog names in recent years. Bella, Charlie, Max, Daisy, Cooper — the current top-name landscape is essentially a parallel universe version of the baby name charts, offset by roughly five to ten years (Bella's peak in pet names followed its peak in baby names, just as you'd expect if owners are drawing from the same cultural pool).

The overlap between top baby names and top pet names is not coincidence. It is direct evidence of the humanization trend: pet owners are drawing from the same naming conventions they would apply to a child, because at some level they are thinking about their animals in the same relational framework they apply to children.

Cross-Species Patterns

The Seattle pet licensing data, which covers both dogs and cats, shows humanization operating across species. Cat names in the dataset also trend strongly toward human names — though with some interesting differences in which human names dominate, which I will come back to in a later piece. What is consistent across species is the near-disappearance of the traditional pet-specific name vocabulary: Whiskers, Fluffy, Mittens, Snowball. These names persist, but they have moved from mainstream to quirky, from unremarkable to slightly retro. A cat named Mittens in 2025 is making a choice the way a baby named Shirley is making a choice.

Defining Humanization in Naming

Pet name humanization has at least three distinct dimensions, and it has moved in all three simultaneously, which is what makes the trend structurally significant rather than just an aesthetic shift.

The first dimension is whether the name belongs to the human name pool. Luna, Charlie, and Bella are human names applied to animals. Fido and Rex are names that exist primarily in the animal domain. Moving from the second category to the first is the most obvious form of humanization.

The second dimension is formality: is the name a full given name or a descriptor/nickname? Spot and Rover are not really names in the same sense that Theodore and Luna are — they are descriptions. Giving a pet a formal given name (even a simple one) signals that the animal is conceptualized as having a proper identity, not just a functional label.

The third dimension is gender-specificity. Traditional pet names were often gender-neutral (Buddy, Fluffy, Whiskers could go either way). Contemporary pet naming has moved toward gendered human names, reflecting increased attention to animals' own gender identities — or, more precisely, to owners' desire to acknowledge those identities in naming.

The Structural Drivers

Naming trends do not shift this dramatically without underlying structural changes. Several forces have converged to produce the humanization of pet names over the past three decades.

Declining Birth Rates and Pet-as-Child Substitution

Research on pet ownership demographics consistently shows that childless adults own pets at higher rates than parents of young children, and that they describe their relationship to those pets in more parent-child terms. This is not a new phenomenon, but it has intensified as American birth rates have declined and the average age of first parenthood has risen. More Americans are spending their thirties without children, and the evidence suggests that companion animals fill some — not all, but some — of the relational space that children would otherwise occupy.

Michelle Dotson and Eva Hyatt, in their 2008 Journal of Business Research study on dog-human companionship, found that dog owners who described their dogs as "like children" were significantly more likely to make higher-tier spending decisions on veterinary care, food quality, and accessories. The humanization of the relationship is not merely linguistic — it changes behavior in measurable ways.

Urban Living and the Pet as Social Anchor

Urban and suburban living patterns matter here too. In dense cities, a dog is often a primary social actor in an owner's daily life — the creature you encounter on every walk, the one who necessitates interaction with neighbors, the one whose presence at the dog park creates a mini-community. The dog's social function in urban life is closer to a person's social function than a livestock animal's ever was. Giving that animal a human name is, in some sense, an accurate representation of the role it plays.

Social Media and the Pet Persona

This one is less studied but probably real: pets with human names perform better as social media subjects. "Luna had the most ridiculous Tuesday" scans as a relatable narrative in a way that "Spot had the most ridiculous Tuesday" does not. The human name cues a certain kind of story about a personality, and personalities are more interesting to follow online than animals. The rise of pet-as-content, with its millions of Instagram accounts and TikTok videos, has created a selection pressure favoring names that anchor a legible human-adjacent persona.

The Social Consequences of Humanization

The shift in pet naming is not only cultural — it has had measurable downstream effects on how animals are treated legally, medically, and emotionally.

The American Pet Products Association's 2023 National Pet Owners Survey puts annual U.S. pet industry spending above $150 billion — a number that has grown dramatically over exactly the period when humanization has intensified. The correlation is not proof of causation, but it is consistent with the hypothesis that how you conceptualize your animal affects how much you invest in it. A pet named Luna, understood as a genuine family member, gets the specialist vet, the premium food, the orthopedic bed. A dog named Rover, understood as a companion animal, gets adequate care.

There are also consequences for grief and mourning. David Blouin's 2013 research in Anthrozoös — "Are Dogs Children, Companions, or Just Animals?" — found significant variation in how people orient toward animals and correspondingly in how they grieve their loss. Owners who conceptualize pets as children experience pet bereavement as qualitatively similar to losing a family member, a grief that can be severe and prolonged. The humanization of naming both reflects and reinforces this orientation.

Cross-Species Differences

There are interesting variations across species in humanization rates and patterns. In the Seattle data, where both dogs and cats are licensed, dog names trend toward a particular kind of humanization — the cheerful, warm, accessible human name (Bella, Charlie, Buddy, Luna) — while cat names show more range, including older-fashioned human names, literary names, and a somewhat higher rate of the whimsical or ironic that may reflect the different cultural construction of cat ownership. Cats are, in the cultural imagination, more autonomous and less domesticated than dogs; the names given to them can reflect that.

Breed matters too. Small dogs — particularly the toy and companion breeds that have proliferated in urban environments — tend to be humanized most intensely, both in naming and in overall owner-animal relationship orientation. Large working breeds show somewhat more variation, with some owners maintaining a more functional relationship that can carry over into more functional names.

The Limits of Humanization

I want to be honest about what humanization does not do, because the trend has critics — mostly animal behaviorists — whose concerns deserve a hearing.

Alexandra Horowitz, whose research on dog cognition has been influential in making people think more clearly about what dogs actually experience, has noted that anthropomorphism — treating animals as if they were people — can lead owners to misread their animals' actual behavioral and emotional states. A dog named Charlie who is treated like a child may not be getting what a dog named Charlie actually needs: sufficient exercise, clear communication, appropriate social structure. The humanization of naming can be part of a broader humanization of relationship that, paradoxically, makes the animal's actual life worse by imposing human social templates onto a creature with different needs.

This is not an argument against calling your dog Luna. It is an argument for holding the human name and the human template somewhat loosely — to remember that the name is a reflection of your relationship to the animal, not a complete account of who the animal is.

What the Extinction of Fido Actually Means

Fido disappeared not because it was a bad name, or because modern dogs are too sophisticated for Latin fidelity metaphors. It disappeared because the relationship it encoded — dog as faithful servant, valued for loyalty to human purposes — no longer matches how most American urban pet owners understand the relationship they are in. They are in something more mutual, more emotionally complex, more expensive, and more difficult to categorize.

Luna is not a perfect name for that relationship either. But it is a name that carries no assumptions about the animal's function, that treats the dog as an entity worth a name rather than a descriptor, and that places the animal within the social grammar of beings we take seriously enough to name carefully.

Whether that is a good development for humans, for dogs, or for both is a question the data cannot answer. But it is happening, and it is happening fast, and the names are how you see it most clearly.