Ayne (Aine) Bru (probably a Catalanization of Hans Brün) was a 16th-century Renaissance painter of German origin who worked in Catalonia. He may have proceeded from Lummen, in the Duchy of Brabant. He is sometimes also called Lucius de Brun. His surname may also suggest provenance from the town of Brünn. In 1502, he was hired to paint the main altar (retablo) in the church of the monastery of Sant Cugat del Vallès, for which he was paid a staggering wage between 1504 and 1507.