Detwan is of African origin, specifically from Swahili, and it means "God is merciful". It's pronounced /deɪˈtwɑːn/. The name is often associated with the concept of divine mercy and compassion.
The name Detwan experienced sporadic popularity over the years, with peaks in the late '70s and mid-90s, but never became extremely common, as indicated by the small number of births each year.