Andrew had at least one brother named Simon who would later be known as St. Peter.
If Paul had any siblings, there is no record of them or tradition.
Michael the Archangel was created by God as a pure spirit long before the universe existed. He was never a human and had no siblings.
did Hitler have any siblings
Jerome (ca. 347 – September 30, 420;, ), best known as the translator of the Bible from Greek and Hebrew into Latin