M.S.
There are databases where you can do a search by first name (or first and last) and date of birth. I did this when I found my birthmom, because I had her birthdate and first name. I paid someone on the internet about $10 (this was over 10 years ago) for the results; they had a subscription to the database. This will significantly narrow down the list of people with your brother's name, and you can start with the ones that are closest to his state of origin. There are also sites on the internet for adoptees or birth parents hoping to reunite, and they might be able to direct you to someone who will do a lookup on one of these databases for a small fee. Good luck!