Looking for Mere Hameka Edmonds Tango

I'D like to know who my greatgrandmother father was?her half brother was John tucker Edmonds,and im trying to find out who her mother was.im from Arthur Edmonds side,so any of the whanau can help that would be great.my mums mother was Waiahurangi Rihari nee tango from Ngawha.im related to the pekamas,youngs,te haras etc......my nana has connections to Parewhenua mare.