The French name Douceline is a variant form of Douce.
Douce is a seldom used baby name for girls. It is not in the top 1000 names.
Baby names that sound like Douce include Dacee (English), Dacey (English), Daci (English), Dacia (English), Dacie (English), Dacy (English), Dadah, Dadda, Daddah, Daeja, Daejah, Daesgesage, Daga (English and Polish), Daggi (Estonian), Daggy, Dagi (English and Estonian), Daijaah, Daijha, Daijhah, and Daisey (English).
† English pronunciation for Douce: D as in "day (D.EY)" ; UW as in "two (T.UW)" ; AO as in "ought (AO.T)" ; S as in "see (S.IY)"