Broderick is a surname which is derived from both the Irish and Welsh languages. In some cases it is an Anglicised form of the Irish Ó Bruadair, meaning "descendant of Bruadar". The name has been thought to have been derived from a Norse personal name (Brodir). However according to Benjamin Hudson, the Norse Brodir (meaning "brother") is not a proper Norse name at all. The Irish Bruattar/Bruadar/Brodur is first recorded in 853, in the name of Bruattar mac Aeda, an Irish princeling from the south-east of Ireland. As a Norse personal name, Brodir is only found in the name of a participant in the Battle of Clontarf and of a King of Dublin, named Brodur son of Porkel, who was killed in 1160. In other cases the surname Broderick is an Anglicised form of the Welsh ap Rhydderch, meaning "son of Rhydderch". The Welsh personal name Rhydderch was originally a byname meaning "reddish brown".
Read more about Broderick: Use As A Surname, Fictional Characters