He never used the name "Barry Sotero" (actually Soetoro), so there was no reason to change it. He inherited his biological father's name (Obama) but never took his step-father's last name. For a time in high school and college, he used the nick-name "Barry" but then decided to use his actual name, Barack.
Barrack Hussein Obama!
Sotero Laurel was born on 1918-09-27.
Lucas Sotero was born on 1991-05-21.
Sotero Laurel died on 2009-09-16.
Heider Dias Sotero was born on 1987-02-17.
Vicenta Barba Labucay married Sotero Barte Cabahug
Barry Manilow's mother re-married and had Barry's last name changed.
Sotero H. Laurel has written: 'State power over private schools'
sotero b. cabahug forum for literacy was my school, and i now it the telephone number is .......oh i forgot but you can ask to a student in sotero b cabahug forum in facebook
He was named Barack at birth and that is the name he goes by now. Barry was a nickname he used as a boy. I suppose that when he grew up he decided to go by his real name.
Barry LeBrock's birth name is Barry Hochberg.
Barry Kent's birth name is Barry Sautereau.