Adam finally has a last name -- and he probably also has a new first name. Adam has been adopted.

The infant was abandoned in July 1979 in Fairfax City when he was three days old. Adoption officials, who named him Adam, say he had been living with his new parents since January.

Although officials refused to release any details about the child's adoption or location, they said the 14-month-old is healthy, well cared for and, of course, loved.

"Anybody who waits at least 2 1/2 years -- as most of our (adoptive) parents do -- can't help but be extremely excited and pleased when a child becomes available," said Fairfax County adoption supervisor Preston Hendrick.

"Their (the parents) happiness is unimaginable."

This history of Adam is one of special interest to area officials.

Swaddled in a white sheet and a woman's blouse, Adam was placed on the doorsteps of the home of William and Jane Fedor, who were inside at a family birthday party. The Fedors told authorities that someone rang their doorbell. When they went to the door, they found the baby.

Adam was the first abandoned child in 20 years to be placed in the care of the Fairfax County Department of Social Services. The department has jurisdiction in both Fairfax County and Fairfax City.

"He was so cute," said Jane Fedor, who has six children. "We wonder about the child from time to time, but never really thought about adopting him. We thought age would be against us -- we were having a birthday party for our 'baby' when the door bell rang. She's 18.

"We were very pleased when we heard on television that he had been adopted."

The adoption was completed in January after an exhaustive six-month search for the child's mother, which included checking hospitals and investigating "street leads" and one woman's claim to motherhood.

"We never really had any idea who the mother was," said Fairfax City detective Ron Phillips. "One woman came forth and said she was the mother. We checked with her family and discovered the woman was about 700 miles away in another state at the time the child was abandoned."

Phillips says the major reason he worked so hard on the case was that he worried about the child never being able to know who his natural parents were.

"I felt a lot of compassion for the baby and worked harder because of it," Phillips said. "I could not imagine growing up and not being able to identify your parents."

While Phillips considered the abandonment tragic for the child, adoption officials say the outcome is not necessarily bleak.

"It is very possible that this could be a positive thing," said Fairfax adoption worker Hendrick. "The mother may have rightfully assumed she was not in a position to be a mother and couldn't face going to an agency. Different people have different reactions to social agencies.

"The child's new family is thrilled and we (the agency) have never had a family which was hesitant to go ahead with an adoption because of the lack of background information. For some parents, it is a bonus."

Two weeks ago, another child was abandoned in the hallway of a Fairfax County apartment building. The child, about two hours old, was found by three youngsters.

Last week, Fairfax County Police Chief Richard A. King presented a certificate of appreciation to one of the youngsters, 12-year-old Matt Poland, for Matt's handling of the incident.

County officials said they have not found the child's mother, and if her identity has not been established in six months, the child will be placed with a family by the county adoption agency.