a mountain (large mass of earth and rock) or (large) hill / a mine (excavation usually consisting of small tunnels) / a heap, pile / the top or high part of an object / a chance, gamble / a climax, peak

summit, top

a fountainhead (source of a river) / a source, origin

river, stream

a surname, especially those who are descendants of Emperor Saga

a source, origin

fountainhead / source, origin / Short for 源氏 (Genji): Minamoto clan

source / origin / root

river

river, stream, brook