Yameen - Oath, right hand, right wing (of the army).
Yaqeen - Belief
Yaqoot - Precious stone
Yaqub - A Prophet's Name.
Yar - Friend.
Yaseen - YASIN, ALIF LAAM MEEM, HA MEEM AIN SEEN KAAF are all Huroof-e-Muqataat.
Only Allah or His Prophet know the meaning of these haroof, but all these huroof
are the most precious words for a muslim