Luinvirdanon, born Sinilatamo near the shores of Lake Mithrim in the First Age, in the time the people of Fingolfin set camp on its southern shore. As his kin followed Turgon in Nevrast and dwelt in Vinyamar, a child Sinilatamo started learning the theory of giving shape to materials and elements under guidance of his father, once a prospector from Tirion. His first gift received had been a sapphire pendant in the form of a cormorant, the same gem from which derived his namesake. When Ondolinde, the Hidden City was completed in the year 116 of the First Age and Turgon's people began the migration from Nevrast, his family followed their leader, settling in for a new life. A good amount of years passed as he studied and practiced both craft and fight under the guide of the House of the Tower of Snow. He  however was never one to boast about his skill be it crafting or swordfight and while the former was a vocation, the latter was a necessity.  For more than four hunderd years the joy and the glory of Ondolinde lasted, until the fated day of its destruction, where Sinilatamo fought with his Lord Penlod and the folk of the Tower of Snow. Defeated, the survivors fled to Sirion, where they had peace for a time, until the last Kinslaying and the Great War that ensued. 

As Gil Galad took the crown, Sinilatamo renewed his allegiance to him. The Age turned and after Beleriand was no more he settled in Lindon, also choosing to be called with the Sindarin version of his name. Ever faithful to the crown, Luinvirdanon followed his King until the culmination of the War of the Last Alliance, and after that, pledged allegiance to the King's Herald. He will stay in Middle Earth, as long as the remnants of his kin still dwell on it