What is Ab Reusnik in parallel journeys

Ab Reusink was a man who befriended Helen and Siegfried when they lived in Amsterdam. Ab was a Catholic and was not under Nazi suspicion so he could move freely about the area without fear. Ab helped Helen and Siegfried by keeping their household belongings when they went into hiding and then giving them the money when the items were later sold. Ab also offered to keep Doris, Helen and Siegfried's daughter, when they went into hiding but they declined because Ab said he would have to raise the child as a Catholic and Helen and Siegfried did not want Doris raised in any specific religion.