Avangrod was born into the House of the Golden Flower in Gondolin in 468FA (First Age) the result of an affair between an elven lord named Tinorian , and a refugee named Isilvire. When the war against Morgoth was going poorly, and many Noldorion cities were falling to the Dark Lord, Gondolin was a hidden bastion removed from the world, to hide the Noldor from the evils beyond their realm.
After the razing of the highlands of Dorthonian, and Angrod slain, his people were scattered and broken. Isilvire, the sister of Angrod’s chief captain, was lost for many weeks in her flight. In search of Gondolin she was found wandering the Echoriath mountains by Glorfindel, and was taken into the House of the Golden Flower. Glorfindel's cousin Tinorian became enamoured with her and in secret they conceived a child. In honour of her lost liege she named the child Avangrod. No one in Gondolin knew who the father was, and for many years this is how it remained.
“I remember some of my best days in Gondolin playing with the other children, there was joy and hope then, but also a subtle undertone of fear and war. When the kingdom of Nargathrond was besieged, people began to leave to cross the great Westron Sea to return to Eldamar to the city of Tirion on Tuna. It was on the great ship, looking out over the wide sea at what we had left behind, that my mother told me the truth about my true father Tinorian, but that it was something I should keep in my heart till the time came when I would cross the sea to meet him again.
It is in Tirion I spent my years and grew well into maturity, playing music and learning new things. Then strangely one day, I awoke in a new land, amongst strange elves in a place called Lothlorien. They look at me strangely not for being anew here, but for my archaic speech and for asking of elves they had mostly never heard about. They say, ‘Why you are not in mythical Valinor but in Middle Earth, and Gondolin and even Beleriand of Old has been lost in the ages long ago beneath the sea to the West.’
This I cannot believe, and so I travel west in search of Lost Gondolin and my father Tinorian though that second is not a name I dare mention. One day I will return to Tirion, but something catches my curiosity: why are the elves of Middle Earth retreating back across the sea to Eldamar? This is something I must discover as well. Perhaps when I find out, I will join them.