Eiler Markvardsen Rønnow was born in 1474 in Svendborg, Fyn, Denmark; died on 25 Apr 1565 in Hvidkilde Ladegaard, Ollerup, Hvidkilde Gods, Svendborg Amt, Danmark; was buried on 28 Apr 1565 in Egense Kirke, Egense, Hvidkilde Gods, Svendborg Amt, Danmark.