Modern invention, possibly meaning hill or mountain
Brevan is a contemporary American name likely created by combining the Celtic root 'Brev' (associated with hills or heights) with the popular 'an' suffix. It may also be a variation of the Welsh name Bevan, meaning 'son of Evan'. Because it is a modern coinage, it lacks a singular historical etymology.
Less common today
Brevan isn't in the latest US Top 1000. It last peaked at #4,112 in 2001.
US births per 5-year period, 1990βpresent (SSA data).