Therapont of White Lake was a Russian Orthodox monk born Fyodor Poskochin in Volokolamsk during the 1330s. After joining the Simonov Monastery in Moscow, he traveled to the Lake Beloye region alongside Cyril of White Lake. He is primarily recognized for establishing the Ferapontov Monastery in Northern Russia around 1398 and later founding the Luzhetsky Monastery in Mozhaysk. Following a request from Prince Andrey of Mozhaysk, Therapont moved to the prince's territory, where he remained until his death in 1426.