Patrick Kluivert's 17-year-old son, Justin, opened his Ajax account in their 1-1 Eredivisie draw with Excelsior.
Feyenoord added another three points to their Eredivisie lead with an away win at Heerenveen.
Justin Kluivert scored his first goal for Ajax during their 1-1 draw against Excelsior in the Eredivisie on Sunday.
Siem de Jong scored the only goal for PSV, who remain in third place, one point behind Ajax, who still have a game in hand.
Feyenoord took a big step towards their first Eredivisie title since 1999 after beating defending champions, PSV Eindhoven.
Ajax thrashed Heracles Almelo 4-1 to move five points behind leaders Feyenoord in the Eredivisie.