If I were to open a phone book for my home city, I find a full page of people with my surname. There's no way Dakota City is smaller than my home town.

Connor is a very common last name. There were 29,346 of them in the last Census.

I know DC likes to create familiar ties between unrelated characters with the same last name. Roy and Jim Harper. John and Lynn Stewart. Dick and Chuck Grayson. Ted and Sandy Knight. But sometimes, a surname is just a surname. Don't get hung up over it.

Without an explicit yes, the answer is no. Not "could be".