Abraham

Jesus was not an only child
http://www.learnbible.net/topical/

Matthew 1:25 And knew her not till she had brought forth her firstborn son: and he called his name JESUS.

Matthew 13:55 Is not this the carpenter's son? is not his mother called Mary? and his brethren, James, and Joses, and Simon, and Judas?
56 And his sisters, are they not all with us? Whence then hath this man all these things?

Luke 8:20 And it was told him by certain which said, Thy mother and thy brethren stand without, desiring to see thee.

Galatians 1:19 But other of the apostles saw I none, save James the Lord's brother.