Can i claim some coparceners share in property suit if they relinsh their right in favour of me?

My 3 grandfathers are brothers and they boght land of 45 acres in 1959 and registered in thier names. each grandfather entitled 1/3 share each. all of them and thier sons and daughters died. thier grand children only existing now. i am one of the grand child of grandfather1. grandfather1 had one son X and duaghter Y.X died leving his wife ( my mom). ,anand(myself),A,B(my brothers) as heirs.Y died laeving her 3 sons and 2 daughters as heirs.All heirs of grandfather1 have signed relinqish deed leaving thier right in favour of me.but relinqish deed not registered.. there is no problem in adding my grandfather1 heirs as defendants if required as they will not contest my claim even now also..and also grandather2 and grandfather3 are having 18 and 26 heirs.i know that i need to include them also as defendants and give thier family relationship in family tree in partion suit.now please answers below questions . 1. can i claim 1/3 property wirh metes and bounds in partion suit.is it necessary to mention relinquision deed in the suit.? if mentioning the deed is necessay then is it ok to mention unregistered deed? 2. just mention share of grandfarher2 and granfathers3 is enough or should i mention share of each heir seperately.in partion suit?grandfather2 and grandfathers3 heirs are not ready /eager for partion now. 3 are Y Heirs(3 sons 2 daughters) having any right in this property?