Looking for Brother Named Alan Christian Fancher

about 2 or 3 years ago i found out my real dad had passed away on jan 21,1991. his name was ellis carl FANCHER.after that i started looking up my last name of FANCHER to research some history and i found out i might have a half-brother named alan christian FANCHER.since then we have moved to another county and just got back on line and my search goes on.if any one has infomation on this please let me know. i think he was born in texas. his mother was maria gonzales. if you know of anything i can look in for free let me know that too. thank you for your help.