Agun

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

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	gun
Closest English pronunciation	/gʊən/
Hint	"give" + "put" + "taken". Not /gʌn/ as in English "gun".
Chinese Pinyin	gūn gún gǔn gùn
Common characters in names	衮