In muslims can we marry my father brother daughter

No

no

Marriages between first cousins are allowed in Islam. In surat an-Nisa' (4:22-24), Allah mentioned the women who are forbidden for marriage and then He said, "… Lawful to you are all beyond those mentioned, so that you may seek them with your wealth in honest wedlock…" In surat al-Ahzab (33:50), Allah mentioned to the Prophet that he may marry the daughters of his uncles and aunts from the father's side or the mother's side. It is the consensus of the jurists that this permission was not only for the Prophet, but it is also a permission for other believers. Muslims have practiced marriages between first cousins in all countries since the time of the Prophet.:)