Beleg Cuthalion (=Strongbow) is an invented character. Prof Tolkien made him up sometime in the late 1910's while writing about his imaginary Middle-Earth.
Beleg was the MarchWarden of the Hidden Kingdom of Doriath, an elven kingdom guarded by the Maia Melian (one of JRR's many Marian analogs).
In Christ,
Deacon Paul+
You would be most welcome to stop by The Hobbit Hole from time to time. We have less to discuss now that the movies are all out in extended format. But we're a friendly group.