He presumably let his wife name them (especially given she named them after her lab rats), along with most of their upbringing. If anything, it's surprising he doesn't see them more as Someones To Remember Her By.
- A first season episode has him point out that their mother was a much more down-to-earth person who was very welcoming and didn't sneer at "lower-class" tastes. Martin's disappointment comes from how they don't take after her more than how they do.
Oh right, that's it. I've had enough of you two jackasses. I've spent all night hearing you make cracks about the food and the help. I got news for you. People like this place. I like this place. And when you insult this restaurant, you insult me. You know, I used to think you two took after your mother, liking ballet and all that. But your mother liked a good ball game too. She even ate a hot dog once in a while. She might have had fancy taste, but she had too much class to make me or anyone else ever feel second rate. If she saw the way you two behaved tonight she would be ashamed. I know I am.