Rachel is a Hebrew name meaning "ewe," making it one of the few human names with an actual animal embedded in its etymology. On a pet it reads as the quintessential human-name-applied-to-dog choice: fully a person's name, specific to a generation (peaked US usage in the 1990s), carrying its era's warmth intact.
The 1990s Reference
Rachel Green from Friends is the unavoidable cultural anchor: a name that peaked during the show's decade and carries that specific 1990s optimism. A dog named Rachel is often a small tribute to that era or to an actual Rachel the owner loved.
The Biblical Depth
Rachel is a foundational biblical name: Jacob's beloved wife in Genesis, the one for whom he worked fourteen years. That weight gives the name genuine depth beneath its pop culture surface.
The Counter-Reading: Very Distinctly a Human Name
Rachel is so thoroughly a human name that applying it to a pet signals clear owner preference for human names over conventional pet names. The human Rachel is well-documented. On a pet, it works best when the dog was named after a real person the owner loved, which is the most honest reason of all.