Siriondil is a fictional character in J. R. R. Tolkiens universe of Middle-earth and the eleventh King of Gondor.

He became King of Gondor in T.A. 748 after the death of his father Atanatar I.

His reign was without any event and probably peaceful. He was succeded by his famous son Tarannon Falastur in T.A. 830

Preceded by:
Atanatar I
Gondorian kings Followed by:
Tarannon Falastur