Dudley's dad

Dudley's dad is Dudley's dad. He has a moustache, a digital watch, and no understanding of his young son.

(Dadley.)

He is presumably related in some way to Dudley's mum.

Fiction

After Dudley had spent over an hour in his room reading those gosh-darned comic books, his dad called up to him, asking when he was going to come out. When he got no response, he headed back downstairs for a hot drink, dismayed at the boy's hobby. The Chromobots issue 12