Is 靥 commonly used in modern Chinese names?

No, it's quite rare in modern naming due to its classical and somewhat obscure nature, though it appears in classical literature and poetry.

What is the difference between 靥 and 酒窝?

靥 is the classical literary term for dimple, while 酒窝 is the more common modern term used in everyday speech.

Strongly feminine, as it traditionally describes facial beauty features associated with women in classical literature.

靥Tone 4

yè ｜ 15 strokes ｜ radical:

Dimple — a small natural indentation in the flesh, especially on the cheeks or chin when smiling.

Dimple — a small natural indentation in the

Smile dimplesWine dimplesDouble dimplesDimpled cheeksDimple appearanceFacial dimples

Dimples have been traditionally considered a mark of beauty in Chinese culture.
In classical poetry and literature, dimples (靥) are often used to describe feminine beauty and charm.
The character appears in ancient texts like《楚辞》and《诗经》describing facial features.