Imin
From Tolkien Gateway
Imin was the first of the three Elf-fathers who awoke at Cuiviénen, and the head of the Clan named after him Minyar, the "Firsts". The clan was later named Vanyar. The other Elf-fathers were Tata, "Two", and Enel, "Three".
Reference
- The War of the Jewels, page 380-381.