Son of David; beloveds son
Dayson is a modern patronymic surname-style name. It most likely originated as a variant of Dyson or as a combination of the name Day and the suffix -son, often interpreted as 'son of David'.
Less common today
Dayson isn't in the latest US Top 1000. It last peaked at #2,081 in 2015.
US births per 5-year period, 1990βpresent (SSA data).