Danny Lockin
Daniel Joseph Danny Lockin was an American actor and dancer who appeared on stage, television, and film. He was best known for his portrayal of the character Barnaby Tucker in the 1969 film Hello, Dolly.
In 1967, Lockin married dancer Kathy Haas, who was a bitpart dancer in a production of Hello, Dolly! in San Francisco. Their son, Jeremy Daniel Lockin, was born in 1969. The couple divorced in late 1969.
Source: Wikipedia