Dudley's mum
From The Transformers UK Appendix
Dudley's mum, also known as Dudley's mom, is Dudley's mom.
She is presumably related in some way to Dudley's dad.
Fiction
When Dudley went for a Saturday afternoon walk in the park with his Chromobot visitor Mikros, he had with him a shopping bag containing comics and his mom's shopping list. The Chromobots issue 14