Harriet and Thaddeus Dowling

Harriet and Thaddeus Dowling are minor characters in Amazon series Good Omens. They are the parents of Warlock Dowling, however, Deirdre and Arthur Young are his biological parents.

Background
It would be nice to think that the real son of Harriet and Thaddeus Dowling was discreetly adopted and grew up to breed tropical fish but the Voice of God suggests this is unlikely. In the book it is implied that their biological son became a bully and has indeed won prizes with his tropical fish.