It's likely you're thinking of a specific instance where these names were used in a humorous or unusual context. Could you please provide more context or the sentence where you saw this phrase?
For example, did you see something like:
* "Dr. and Mrs. Vandertramp always went to the opera on Tuesdays." (Here, the verb is "went" and is conjugated for the past tense).
* "Dr. and Mrs. Vandertramp are going to the beach tomorrow." (Here, the verb is "going" and is conjugated for the present continuous tense).
Once you provide context, I can help you understand how the verbs are used in that particular sentence.