Sweety is a term of endearment written directly onto a license form. At rank 2166, it appears when an owner names a pet what they actually call it, the phonetic spelling of "sweetie" that bypasses formal naming and just tells you exactly how the owner feels. That genuineness is part of its charm.
Term-of-Endearment Pet Names
Sweety, Honey, Baby, and Darling form a category of pet names that function as affectionate terms that became official. The owner called the pet Sweety, eventually needed to write something on a form, and wrote what they'd always said. Malteses and Cavalier King Charles Spaniels, bred entirely for companionship, suit Sweety naturally.
Spelling Note
Sweetie with IE is more standard in English, but Sweety with a Y appears regularly in registries, reflecting personal spelling preferences. The Y ending puts it in loose company with Honey, Daisy, and Sunny in the affectionate Y-ending name cluster.
Counter-Reading: Reads as Informal
Sweety doesn't carry authority as a name. "Sweety, no" has inherent softness that "Max, no" doesn't. If you want the affectionate register plus actual command authority, Daisy or Rosie offer similar warmth with more grounded sound that cuts through noise.