Castello Family History

Italian: from castello ‘castle fortified building’ (from Late Latin castellum) applied as a topographic name, a habitational name from any of numerous places called with this word, or a metonymic occupational name for a servant who lived and worked in such a place. Compare Costello.

Catalan (Castelló): habitational name from any of the places called Castelló, as for example Castelló de la Plana, one of the main towns in Valencia province (Spain), or Castelló d'Empúries, a town in the Catalan district of L'Empordà.

Irish: shortened Anglicized form of Mac Oisdealbhaigh; see Costello.

English: variant of Castlehow, a habitational name from any of the six places called Castlehowe in Westmorland, usually recorded very late, the earliest being Castle Howe in Kendal (1577) and Castlehowe Scar in Crosby Ravensworth (1629). The form de Castello, not infrequent in medieval sources, is probably a Latinization of Castle, but may have contributed to these names.

American shortened form of Italian Castellano. In some cases, possibly also an Americanized form of Slovenian Kastelic or perhaps of some other like-sounding surname (compare Costello).