For others wanting to offer an opinion, here is the actual record: https://www.digitalarkivet.no/kb20061107010376

Zooming in as far as reasonable:

Scanning of the rest of the page and looking just at the entries in the same handwriting, the clerk or priest does seem to have a somewhat sloppy lower case A when not connected to the preceding letter. Two marriage entries above is:

I've never run across the name Meren before. This has to be Maren. So I would agree with you that this is more likely to be Peder Hansen

This search: https://www.digitalarkivet.no/search/persons/advanced?from=&to=&c%5B%5D=02&m%5B%5D=0301&firstname=pede*&lastname=h*&birth_year_from=&birth_year_to=&birth_date=&birth_place=&domicile=&position=&event_year_from=&event_year_to=&event_date=&related_first_name=karen&related_last_name=christofersdatter&related_birth_year=&sort=rel gives two birth records for a Peder Hansen and Karen Christophersdatter living at Ammerud which is the place listed in the marriage record.

This 1801 census for Aker, there is a Peder Hansen married to a Kari Christophersdatter with daughters Anne and Martha. https://www.digitalarkivet.no/census/person/pf01058216003441 The only two Peder Henriksens are single.

Looking for daughter Anne's birth record in about 1792 since she was turning 8 in 1801, which I'm assuming is what you already found, gives: https://www.digitalarkivet.no/kb20061107010199 which shows Anne's christening Dec. 9, 1792 with parents Peder Hansen and Kari Christophersdatter at Ammerud, which is the place named in the marriage record. Hard to tell in the marriage record if that was Peder's residence or Karen's. But that does tie the marriage record, birth record, and census record together nicely.

I'd go with Peder Hansen.