Debbie,
I did a yahoo search on david kennedy pictures... and got this hit.
I think this is David... and he was a very handsome guy. He died in 84... I'm sure if you saw his picture it might ring a bell or not. Compared to the rest of the Kennedy's, he appears to have his own special look. Many of the others share unique characteristics..
I was going to post that link...but it's humongous. Just do a search.. the hit I came up with also had the rest of the kennedy family tree.
It did have an option to view just that picture and it's link was significantly shorter.. Check it out. Maybe the pict will confirm or discount who your paths crossed with way back when!
http://www2.jsonline.com/news/jul99/david.jpg
The Robert Kennedy family did live in McLean.. Probably about 5 miles from where I grew up. I've seen the house before.. Not sure if Ethel still lives there. (Do you know she and Andy Williams dated or had some sort of special friendship or relationship for many many years?) I think The Shrivers were based in Md. (That was Eunice Kennedy and her husband Sgt. Shriver).. Maria Shriver (Arnold Shwarzeneggar's wife was from that clan!) Kathleen Kennedy Townsend is the attorney general of Md. now.. so I guess she moved over the river at some point during her professional career!