If it's too long people might use In English: Dave
For the opposite sex use: In English, Jewish, French, Russian, Czech and in the bible: David (M) In English: Davida (F) In English: Davina (F) In Other languages: Davena (F)
See also In Welsh: Taffy (M) In Welsh: Dai (M) In Jewish: Dudel (M) In English: Davey (M) In English: Davy (M) In English: Davie (M)