The first duke was Boqin , a son of the Duke of Zhou , who was brother of King Wu of Zhou and regent to King Cheng of Zhou .
Head entity: king wu of zhou Q1061289 18 19 20 21
Tail entity: king cheng of zhou Q388766 25 26 27 28
Relation (head \u2192 tail): P40
Inverse relation (tail \u2192 head): P22