Your brother's daughter, maybe (5)
I believe the answer is:
niece
(Other definitions for niece that I've seen before include "Kinswoman" , "Brother's girl" , "Brother or sister's daughter" , "[PRIEST'S] daughter?" , "A younger female relative" .)
I believe the answer is:
niece
(Other definitions for niece that I've seen before include "Kinswoman" , "Brother's girl" , "Brother or sister's daughter" , "[PRIEST'S] daughter?" , "A younger female relative" .)