eng names......

I think Clarkia is a better name for you, it makes a pair of Cs.

CLARKIA CHIU
it is quite a good combination.

Nobody cares about the meaning of the names, unless they are obviously bad in meaning.

i like "Clarkia" ^^

I think 2. Iwis is better coz people usually can't pronounce it correctly for "CL" sound in Hong Kong and Iwis (pronunce as "e-wis, right) just got 2 sound only.

I think Iwis is much better as it has the meaning of really; truly; indeed; honestly; in truth; in faith; in conscience; and no mistake. so i think it would be better in meaning.

whille Clarkia is the name of a plant type 山字草屬植物

if i were you, i would choose Iwis instead of Clarkia