He appeared before Tuor and urged him to go to Gondolin as a messenger to Turgon; when he got there he eventually married Turgon's daughter Idril and fathered Eärendil; Ulmo saved Eärendil's wife Elwing from the sack of the Havens of Sirion, allowing her to take a Silmaril to her husband, which allowed him to gain admittance to Valinor and plead for aid.