Clack Family History
Clack Name Meaning
English: from a Middle English personal name Clac, which is from Old English Clacc or the Old Norse cognate Klakkr. As a personal name this is from a word meaning ‘lump’ and may have been used as a nickname for a large or thickset man. Reaney suggests that it could also be from clacker ‘chatterer’.
Source: Dictionary of American Family Names ©2013, Oxford University Press