"/target Frodo" isn't working for you? Although, /targetexact would be more helpful.

You can also use target=pet for your own pet, or target=partypet1 (partypet2, etc) for a different party member's pet (in listing order following the party1, party2, etc order), or target=raidpet1 etc for raid member's pets.

But if you're not in a group, you're pretty much stuck with /targetexact.