Looking for family info

My Name Darrell Franke I was born Darrell Roy Blacketer. My father is William Blacketer born 01/02/1934 in Sturgis South Dakota. I know he had two brothers Norman Howard who was adopted out at a young age. He passed quite a few years ago now. Then there is Delmar Blacketer.My father and Delmar are not that close for whatever reason last time I heard mention of him he was in the Seattle Area somewhere. I have 3 brothers and a sister but know there has to be more relatives out there. I can be contacted at otherbrother_darrell@hotmail or yahoo