华西亚（Rahere，－1144年）是一名修士和亨利一世的宫廷弄臣。

关于华西亚生平的许多细节已经与传说相混淆，但是无疑这是一个真实存在的历史人物，并作了传说中的许多事情。他被描述为一位修士、吟游诗人、朝臣和弄臣，在他一生中的不同时期，可能做过所有这些。

在1115年的一份文献中，他被列为圣保罗座堂的一位诵经员。他在罗马朝圣时病倒，梦见巴多罗买要他创建一所医院。他返回英国以后，在1123年，创建了圣巴多罗买医院和邻近的圣巴多罗买大教堂，担任此教堂的领袖，直到1144年去世。在此教堂可以看到它华丽的坟墓。

Rahere, or Raher or Raherius, was an Anglo-Norman priest and monk. He was a favourite of King Henry I and is most famous for having founded the Priory of the Hospital of St Bartholomew in 1123.

Many of the details of Rahere's life have become confused, having been variously described as a cleric, a courtier, a minstrel and a jester, but undoubtedly Rahere existed and did many of the things in the legends about him. He may at different times in his life have been all of these.