Isaac, who was born of his wife Sarah and the inheritor of the birthright.
Esau (Esav) and Jacob (Yaakov) were twins. Esau was the first to be born, with Jacob emerging literally on the heel of his brother.
Abraham's second wife was Keturah, who bore him six more sons, one of who fostered the medianite tribes, these are the ones who lifted Joseph from the pit, selling him to the the Ishmalites(descendants of Abrahams first son by Sarah's handmaid), who then sold Joseph into Egypt.
Ishmael is his first born by a servant. Issac his second born by his wife.
Isaac
Doris Abrahams was born in 1921.
Sidney Abrahams was born in 1885.
Israel Abrahams was born in 1858.
Bennie Abrahams was born in 1907.
Ottilie Abrahams was born in 1937.
Peter Abrahams was born in 1919.
Chris Abrahams was born in 1961.
Carl Abrahams was born in 1911.