Pierre-Eugène-Aloys OCist, also known as Gerardus Rubens (born 1674; died 21 January 1736), was the 42nd Abbot of the Common Observance in St. Bernard's Abbey, Hemiksem.

His parents died at young age, and he was educated by his uncle the reverend Eugenius Rubens.

His arms are the ones of the House of Rubens and his Motto was in Pace et equitate.

The archduchess, however, sent him to Orval Abbey to fight Jansenism, which was considered as a major problem.

Historically, he is considered as one of the important people for the history of the abbey.