devildoc255 on Family Tree Circles

My name is Jeremy Duncan and I am trying find as much info as possible to research my ancestors from the time they migrated to America until now. My biological father is Robert Duncan who resides in Afton/Janesville Wisconsin. I also have one half brother named Rick Duncan Living in Janesville/Milton,whom I have met. I have Another half brother, Gary , who died in a plane crash back in the 90's on his honeymoon. I also have two half sisters, but do not know their names. I have not met my father and although I have tried, I have not been able to contact him. I know there is someone out there with information which will help me. Thank You.