Surprised you didn't spot the connotations with 'Quit' eg Miguel Quitto, Quitali Bitchsko etc It's the first thing people are going to think.
Well, English is not my native language, it simply never crossed my mind. And -quito is pronounced -keeto in Spanish. Everything that ends in -ca and -co in Spanish goes to -quita and -quito in diminutive form, like barco - barquito.