The surname Watkins comes from 'Wat', the Welsh form of Walter, and 'kin', meaning little. So Watkin means 'Little Walter'.
Watkins is one of many Welsh surnames deriving from the patronymic naming system. This means that someone who was an 'ap Watkin', or 'son of Watkin' adopted Watkins as their surname.
In Wales, the surname Watkins is most commonly found in Glamorgan and Monmouthshire, in south/southeastern Wales.
In the US, the surname Watkins is most commonly found in
1. Virginia
2. Missouri
3. Washington D.C.
4. Georgia
5. Kentucky