Sofi is the minimalist spelling of Sofia or Sophie, dropping the terminal vowel to create something that reads as intentionally modern. For a female pet at rank 2165, it's a variant that reflects a personal spelling preference rather than a separate naming tradition. The name means "wisdom" from the Greek sophia in all its spellings.
The Sofia Spelling Variant Landscape
Sofia, Sophie, Sophia, Sofie, Sofi: all mean wisdom, all are correct in their own cultural contexts. Sofi without a terminal vowel reads as Scandinavian-influenced or streamlined. Dachshunds and French Bulldogs, breeds with European associations, carry Sofi naturally.
Human-Pet Crossover
Sofia and Sophie are consistently top-10 US baby girl names, so they've long since saturated pet naming. The human name Sophia has been in the US top 3 for over a decade. Pet Sofis borrow that warm cultural saturation in a slightly more personal package.
Counter-Reading: Will Be Spelled Wrong Constantly
Every form gets corrected everywhere else. Sofi will be written as Sophie or Sofia by everyone who isn't you. If the specific spelling matters, correct it consistently. If not, Sophie is the path of least resistance and has more history behind it.