The 3.6-kilogram boy named Zachary Jackson Levon Furnish-John was born December 25 in California, the singer and David Furnish told UsMagazine.com.
'We are overwhelmed with happiness and joy at this very special moment,' John and Furnish told the website. 'Zachary is healthy and doing really well, and we are very proud and happy parents.'
The boy is the first child for John, 62, and Furnish, 48, who married in 2005 in a civil union in England. They withheld the identity of the surrogate mother.
John sought in 2009 to adopt a 14-year-old boy while visiting an AIDS orphanage in Ukraine, but his request was denied because of laws requiring adoptive parents to be under 45 and married. Civil unions did not qualify under the law.