Son of Bren or son of the raven
Brenson is an English patronymic surname-turned-given-name. It likely originated as a variant of Branson or as a derivative of the name Bren, which itself stems from the Old Norse 'brandr' meaning sword or the Celtic 'bran' meaning raven.
Less common today
Brenson isn't in the latest US Top 1000. It last peaked at #5,618 in 2010.
US births per 5-year period, 1990βpresent (SSA data).