Earliest name of the swan have of the Sea Elves, appearing both with (LT2/82) and without (LT1/164) the genitive suffix -n.
Early Quenya
kópa
noun. harbour, haven, bay
kópas
place name. Haven
kópas
noun. haven
kópas alqalunte(n)
place name. Haven of the Swanships
Short name for Kópas Alqalunte(n) in the earliest Lost Tales (LT2/255).