Costain Family History
Costain Name Meaning
Manx: from a shortened form of Mac Austein ‘son of Austein’ which might represent an unrecorded Old Norse personal name Authsteinn from authr ‘wealth’ + steinn ‘stone’ or a Scandinavianized form of Latin Augustinus (see Augustin ) with substitution of Old Norse -steinn. English and Scottish: variant of Costin . Americanized form of Dutch Kosten .
Source: Dictionary of American Family Names 2nd edition, 2022