Where does “Broderick” come from?

Broderick is an English surname derived from Welsh ap, a patronymic prefix meaning "son of," which developed from the earlier Welsh form fab with the same meaning.

Ancestry of “Broderick”, step by step

Step	Language	Word	Meaning
1	Welsh	ap	A patronymic indicator; son of
2	Welsh	fab	Soft mutation of mab
3	Welsh	mab	boy, son, infant, child , minor, youth;...
4	Old Welsh	map	—
5	Proto-Brythonic	mab	son
6	Proto-Celtic	makʷos	son
7	Proto-Indo-European	mh₂ḱwos	—
8	Proto-Indo-European	meh₂ḱ-	to raise, increase; long

Every word from Proto-Indo-European meh₂ḱ- →

Broderick — Etymology, Origin & Word History | Etymology Explorer