Annie and Finnick Odair's son

The Baby Odair is the son of Annie and Finnick Odair. He was born after his father's death.

Biography
The baby was conceived shortly after Annie and Finnick's wedding; Annie was pregnant when Finnick left to fight against the Capitol.

Annie gave birth to her son after Finnick's death and she sent her son's pictures to Katniss Everdeen and Peeta Mellark who added the photo to their Memory book.

Family
Boy Odair was raised by his mother; without his father who died before his birth. It's probable that he was in contact with Katniss and Peeta Mellark (his parents' friends) and theirchildren.