Santo

Santo in other languages is a surname of religious inspiration, more precisely related to Christian identity when he speaks of someone who is devout or blessed.
For example, in the Italian language, there are forms Santi, Sancte, Sante, Santé, Santese, Santes, Santy, Santesi, Santhia, Santia, Santis, Di Santis, De Santis, De Sanctis, Desantis, Sanctis, Di Sanctis, Sancti, Di Sancti, Sanctius, Sancto, Di Sancto, Dei Santi, Santini, Santinni, Ognissanti and Ognisanti (then Santi is son of Santo or in English is Descendant of the Saint man / the Just man / the Righteous man). It's a household name in the North of Italy (Cisalpine Gaul) where from Celtic tribes from Ireland and Scotland were established or settled for centuries in Northern Italy, especially in Piedmont.
One of the best known cases is the Scotti surname and it comes from Scott (Scottish; a native of Scotland or born in Scotland) that comes from the Scottish Gaelic. Then Scott adapted to the Italian language and added a Latin I representing a suffix of sonship. That is, the descendants of Scott.

Santo is also the Cornish diminutive of Alexander.