Adun

It is composed of two syllables: "A" and "Dun".

Spelling	a
Closest English pronunciation	/ɑ:/
Hint	As the a in English "art".
Chinese Pinyin	ā á ǎ à
Common characters in names	阿

Spelling	dun
Closest English pronunciation	/dʊən/
Hint	"do" + "put" + "taken".
Chinese Pinyin	dūn dún dǔn dùn
Common characters in names	顿 盾 敦