Looking for My Family

MY DAD FATHER IS JAMES MELVILLE WHO WAS BORN SOMEWHERE AROUND THE LATE 1890'S FROM BOSTON I THINK ...HE WAS IN WORLD WAR 2 AND HAD A PRE FAMILY IN ENGLAND SOMEWHERE WITH 3 OR MORE CHILDREN >NOT SURE THEN MOVED TO CANADA AND MARRIED MY GRANDMOTHER AND HAD MY FATHER AND HIS SIBLINGS >MY GREAT GRAND FATHERS NAME WAS WILLIAM MELVILLE FROM SCOTTLAND I THINK ........HELP!