If the kids are the focus, there's really no need to give the parents names since it's not likely they'll have a day in the limelight to themselves. When you give a character a name, that suggests they'll be playing a role outside of what's been assigned to them. That's why the
Rugrats parents stand out so much, because they have names and thus they actually play a bigger role in the series than expected even though the babies are the main focus. Hell, in some cases, you focus on the parents more than the children themselves, but the child audience doesn't pick up on that immediately.
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