While researching, I came across the letters "ap" in front of a name. Here is an example:
ap Rhys, William (~1525 - 1588) - male
b. ABT. 1525 in Boemar,BUCK,Eng.
d. 1588 in Boemer, Buckinghamshire, England
father: ap Gruffudd, Rhys (~1454 - 1532)
mother: Howard, Katherine (~1508 - 1548)
spouse: Myal, Thomasine (1524 - >1568)
- m. 30 AUG 1546 in Suffolk, England
----------child: Rice, Henry (~1555 - )
Has anyone ever seen this before?