Frederick of Liege was a 12th-century Catholic bishop born in Namur to Count Albert III and Ida. Following the departure of Bishop Alexander, who was removed due to accusations of simony, Frederick assumed the leadership of the diocese. His tenure was marked by significant tension, as he faced intense hostility from the supporters of his predecessor. This political friction, stemming from local conflicts involving the Count of Louvain, contributed to the circumstances of his early death in 1121.