Dierdre Watley

Dierdre Watley was a female Human who held the rank of Lieutenant in the 2260s. She once served on the USS Lexington (NCC-1709). 

Watley transferred to the USS Enterprise (NCC-1701) around a week before its arrival at Deep Space Station K-7. Julian Bashir and Miles O'Brien met her in a turbolift aboard the starship. As his great-grandmother's name was Watley, Bashir became concerned that he was his own great-grandfather and that he could be erased from time if he did not meet Watley in Sickbay. 

Watley played the flute and the piccolo. (ST CCG: The Trouble with Tribbles)