Lemon ranks #859 with 137 female registrations. The name is bright food-noun pet aesthetic at its cheeriest: a citrus-noun on the formal license, almost certainly chosen for the color-match or for the vivid sound itself.
The food-noun feminine cluster
Lemon sits with Peach, Cherry, Olive, Pumpkin, and Mango in the cluster of bright food-noun pet names that emerged in the 2010s and 2020s. The naming logic on this slice is usually one of three: literal color-match (yellow or cream-coated dog or cat), personality-match (a tart or zippy temperament), or 30 Rock fandom (Liz Lemon, Tina Fey's character whose surname became the affectionate household-shorthand on the show). Each channel pulls a slightly different demographic.
Sound and breed lean
Two syllables, front-stressed (LEM-un), with a soft L opening and a soft N close. The name calls warmly outdoors and pairs naturally with the affectionate diminutive register (Lemmie, Lemonhead). Lemon lands with notable concentration on yellow or cream-coated dogs (yellow labs, golden retrievers, Pomeranians) and orange tabby cats whose owners committed to the citrus-color label. See golden retriever names for the color-match cluster.
The counter-reading
The honest concern is that Lemon also carries the slang sense of "a defective or disappointing item" (as in lemon laws for cars). Most owners wave this off, but it can come up unexpectedly in conversation. If the household wants the bright-citrus register without the slang baggage, Clementine or Mango sit close. The human Lemon page confirms zero SSA presence.