Greta Garbo — the Swedish actress whose reclusiveness became as legendary as her screen presence — is the almost certain origin of this name. "I want to be alone" is the most famous line never quite said (the actual quote is "I want to be left alone"), but the concept applies brilliantly to a cat who has similar social preferences. Garbo is, in particular, an ideal cat name.
The Garbo Cat Logic
Greta Garbo retired from film in 1941 at age 35, turned down every subsequent offer, and spent four decades as a ghost in Manhattan who was occasionally photographed on the street. A cat who disappears for hours, tolerates limited social interaction, and maintains a distinct air of mysterious self-sufficiency has earned the name fully. The female registry classification at rank 2526 makes sense: this is primarily a name for enigmatic female pets.
The Sound Profile
GAR-bo is two syllables with a satisfying R and a round -o landing. It sounds somehow old and sophisticated, which matches the reference. Works on cats of any breed, particularly Russian Blues and any gray-coated cat with reserved social energy.
The Human Name Rarity
The human name Garbo is essentially only ever a surname — which makes its pet name status a distinctive inversion. A dog named Garbo is unexpected; a cat named Garbo is almost inevitable.
The Counter-Reading: The Recluse Who Still Gets Attention
Garbo became famous partly by refusing to be famous. A pet named Garbo who actively seeks attention is contradicting the reference but may simply not have read the brief.