Find friend, Family - looking for barbara ann young daughter of francis young

my name is NANCY ANDERSON i am looking for BARBARA ANN YOUNG. she has a son named ROSS she is my half sister and i believe she is living in glascow scotland. i met her once when i was 5y/o. our mother was FRANCIS YOUNG and she moved to the states when barbara was about 2y/o, my mother married my father and became FRANCIS ANDERSON. if anyone has any information that could lead me to her please let me know. thank you