I've been consuming a lot of mafia stuff lately because of mafia the old country. rewatching classics, reading mob history like lucky luciano and others. Then I remembered Tifa. So why not put Ms. Italy herself and the mafioso together? Like that one episode in sopranos where Tony went back to the old country and the boss there is a sexy, voluptuous, semen demen!
Then I tried to Italian-ize Tifa's last name. After several iterations I gathered, I went to "Luccapetto!" The first half of her last name, Lock, in Italian is serratura. Which is tooooo long for it to be the first half of her last name. It's 4 syllables, Madonne! So I went to Lucca even though it doesn't translate to lock. But it sounds good!
The second half of her surname, hart, is quite easy. I went with petto because in Italian, it can be translated to both heart and breasts. Tifa has a big heart, and so are her fat juicy titties, petto enorme!