wonderin if i have any brothers or sisters

hello to all readers, my wife was looking for her lost adopted older brother. and as her curiosity runs wild. decided to add my name to her looking list as i am also adopted, well she came up with the original birth certificate for myself i was born william francis henley jr < not name now adopted parents changed to <peter e neff> to a mr william francis henley sr and a barbra jean ankrum <this is maiden name i think as this is what it shows on the birth certificate> shows barbra j henley signed mother they were both 25 at the time of my birth it also show they lived on 31st and belmont st i was raised on hazelfern right off of glisan i was born at multnomah hospital at 6:22 a.m i was adopted at age 2 i can still remember the ride to the home i was adopted it is about 10 mins by car and the ride was about 10 mins long if any one has any info on the parents or possibly siblings would be neat to know also if you feel this info would be detrimental to the birth parents i fully understand . as adoption is sometimes a hard Alternative to live with and i have never really thought of looking up my birth parents as i wouldnt have the fist clue to as how to ask the "big" question as to why? thank you for your time reading my long post pete