It is pronounced dah-YAHN or dah-YEN
Diana, pronounced dee-an-a is given as the Irish form, presumably the Scottish Gaelic is the same.
Diane Keaton Diane Carroll Diane Lane Diane Kruger (German model and actress)
Diane (DIE-anne), in Japanese, could be pronounced a number of ways. If one desired to keep the original pronunciation of the name, the spelling would change; in romaji (Roman characters; the Western European alphabet) this would be Daiannu.If, on the other hand, the person in question wished to preserve the original spelling but pronounce the name following Japanese rules of pronunciation, it would be pronounce dee-a-nay, with all syllables pronounced at the same tone.ダイアン(Diane)Diane is well-known western name in Japan and not difficult to pronounce it in Japanese.Diane sounds like Taian (大安 the good luck day).
Diane = Kiane
Diane Disney and Diane Keaton are two different people. Diane Disney, who became Diane Disney Miller, died in 2013. Diane Keaton is an actress.
Diane Keaton's birth name is Hall, Diane.
Diane Kruger's birth name is Diane Heidkrger.
Diane Mahree's birth name is Diane Rystad.
Diane Sommerfield's birth name is Diane Young.
Diane Asselin's birth name is Dailey, Diane.
Diane Ogden's birth name is Diane Benjamin.