Tello is my first ex-husband's name. He told me he was half Italian. (We met on the East Coast; he lived in Massachusetts, and New York, prior to meeting me.) I was married to him quite young, and kept the name when we divorced. My second husband was Libertarian Dennis Thompson (deceased 1994).
I had wondered if Tello might be Italian. A lot of the Tellos on the Social Security Death Index have obviously Spanish first names, but I think there are a number of cases where a name can be either Italian or Spanish with the same spelling (maybe because both languages are derived from Latin, or perhaps from Spaniards settling in Italy during periods when parts of Italy were under Spanish domination). Of course the pronunciation of Tello is different in the two languages.