Chinese characters are monosyllabic, so you need two of them. In this case, there are two names: they differ in the first character.
siɛ̀u ciu3 xiao4 XIAO4 XIAO1
CHO SO
SHOU NIRU KATADORU AYAKARU look like, resemble, be like
*ha haa4 xia2 XIA2 HA KA GE
KASUMI KASUMU rosy clouds
and
hiu2 xiao3 XIAO3 dawn, daybreak; clear, explicit
*ha haa4 xia2 XIA2 HA KA GE
KASUMI KASUMU rosy clouds
The first character of the second name was
*xěu hiu2 xiao3 XIAO3 HYO hẻo GYOU
KYOU AKATSUKI SATORU dawn, daybreak; clear, explicit
before simplification
As you can see the xiao differs in tone in the two names. Check https://chinesepod.com/tools/pronunciation/section/17 for example for the difference between the third and fourth tones.