Shadlock Family History
Shadlock Name Meaning
apparently from Middle English shathien (Old English sc(e)aþian) and scathen (Old Scandinavian skaða) ‘to harm damage’ + lok ‘lock (of hair?)’. It may have been given to an incompetent barber or to someone with ill-kempt hair.
Source: The Oxford Dictionary of Family Names in Britain and Ireland, 2016