NEW YORK -- Among the most mysterious stories of people listed as missing in the World Trade Center attack are a baby and his 4-year-old brother, who would be the only children killed in the towers if their deaths could be confirmed.

Eleven-month-old Edward Vanvelzer, his brother, Barrett, and their father, Paul Herman Vanvelzer, were reported missing by the grandmother, who lives in California, said Ellen Borakove, a spokeswoman for the medical examiner.

The city has little information about the family but -- nearly a year after the tragedy -- continues to list them on its official tally, based on the grandmother's report and the DNA sample she submitted to assist in identifying remains.

Just eight children, ranging in age from 2 to 11, are confirmed to have been killed Sept. 11, all of them aboard hijacked planes. The early morning attack came at a time of day when children and older people were not likely to have been at the trade center. The observation deck was not open when the 110-story towers were attacked.

On Friday, the city revised its list of dead and missing to include 2,801 names, 18 fewer than it reported last month. The total fell as some people reported missing were found alive, suspected fraud cases were discovered and duplications were eliminated.

The Vanvelzers are among about 70 names still listed as missing in the attacks, people for whom no remains have been found and no death certificate has been issued.

Although city officials are not certain the Vanvelzers died, their names and those of the other missing people will be included when all victims' names are read aloud at this week's anniversary ceremony.

The missing have been memorialized in other ways, too. In June, three Chinese Fringe trees were planted for the Vanvelzers in a California park among dozens honoring Sept. 11 victims.

"We have a tree with every individual's name on it," said Sharyn Romano, president of the Hollywood Beautification Team, an environmental group. "They have three -- one for the father and one for each little boy."

City records identify the grandmother as Elaine Mayamori of Lake Forest, Calif., although the Hollywood group provided an alternate name spelling and said she used Vanvelzer as well.

No phone listing could be found under either name spelling. Romano said she relayed an interview request to the grandmother, but said the woman did not wish to speak to a reporter.

It is not clear what the family was doing at the trade center. Borakove said the medical examiner's office does not know whether the father worked in one of the towers or was visiting and took the boys there as tourists.

The oldest confirmed victim was 85-year-old Robert Grant Norton, a passenger on American Airlines Flight 11, which crashed into the north tower. The youngest confirmed victim was Christine Lee Hanson, 2, of Groton, Mass. She died along with her parents, Peter and Sue, on United Flight 175, which hit the south tower.