Is 妒 commonly used in names?

No, 妒 is generally avoided in Chinese names due to its negative meaning of jealousy and envy.

What's the difference between 妒 and 嫉?

Both mean jealousy, but 妒 often implies envy of others' advantages, while 嫉 can also mean hatred. They are frequently used together as 嫉妒.

Rarely. In some classical contexts, it might be used to describe righteous indignation, but modern usage is overwhelmingly negative.

妒Tone 4

dù ｜ 7 strokes ｜ radical: 女

jealousy, envy;

to be jealous or envious of someone

jealousy, envyto be jealous or envious of someone

jealousyenvyjealous womanjealous manbe jealous ofjealous nature

Traditionally associated with negative feminine traits in classical literature.
Considered one of the 'seven reasons for divorce' for women in ancient Chinese law.
Often used to describe destructive emotions that harm social harmony.