I'm inclined, from a lifetime of hard work, to plod along, following the primary line. I am willing to create a new profile, for Jan, and leave the existing profile for Johannes, for whom we have a birth record. Jan is a bit more ethereal, in that we don't have birth or marriage records for him, while birth records for his children are numerous. Based on the baptisms of his children, and his frequent appearance in these records, and those of his presumed siblings, I would like to create a new profile, with uncertain parentage, who is certainly connected with these people, despite the lack of records that establish his parentage.