There are plenty of bad and dubious connections post-1500 too. In my lower Telemark genealogy, where there are very few profiles going further back than abt. 1580, I can frequently find bad connections. One of the most recent was a girl who married in Østfold county in the 1820s, who was conflated with a namesake in my area at the same age. Unfortunately, that girl died at an age of 12, and I've had to cut the connection.
The name was extremely common, like the Norwegian equivalent of Mary Brown. It's beyond me to conceive that a girl with such a common name should have travelled 200 miles away from home, across the Oslo fjord, to marry.
Yes, somebody could have done it, but more likely she was the girl next door. But that girl probably didn't have a birth record available on the Web.