R&B star Ciara has named her newborn son after his rapper father Future.

The singer gave birth to her first child in Los Angeles on Monday (19May14) and she debuted the first photo of her baby boy's arm on her Instagram.com page on Tuesday (20May14).

More: What's behind the name? Ciara calls son Future Zahir Wilburn

Revealing the name of the new arrival in the accompanying caption, she wrote, "Future ZAHIR WILBURN 9lbs 10oz May 19 2014".

Ciara and the hip-hop star, real name Nayvadius Cash, became engaged in October (13).

The boy is Future's fourth kid - he also has three children from previous relationships.