He was married to Birgit Cullberg and is the father of dancer Niklas Ek ( born 1943 ) , dancer Mats Ek and actress Malin Ek ( twins born 1945 ) .
Head entity: mats ek Q646397 20 21
Tail entity: birgit cullberg Q435063 4 5
Relation (head \u2192 tail): P25
Inverse relation (tail \u2192 head): P40