consanguineous
adjective social science specialized uk/ˌkɒn.sæŋˈɡwɪn.i.əs/ us/ˌkɑːn.sæŋˈɡwɪn.i.əs/
同血统的，有血缘的;同族的，同祖先的
connected with the fact of people being blood relations (= related to someone by birth, not marriage)
Some Hindu groups prefer consanguineous marriages while others prohibit them. 一些印度教团体崇尚近亲结婚，而另一些则禁止近亲结婚。