Pieter-Jan van Lill is a Namibian rugby union player. Van Lill was on the Namibian squads for the 2011, 2015 & 2019 Rugby World Cup. He started his French rugby career with Dax in July 2014 where he stayed for 1 season and played 21 games for the Landes team.

van Lill joined Aviron Bayonnais in 2015 where he played 99 games during his 5 season at Bayonne.