What is the meaning of the name "Ladun" with a ḍammah on the dāl, and does it mean "al-ladn" (supple/soft)?

Ladun: An adverb of time and place meaning "at" or "with".

The feminine equivalent derived from this root is "ladnah," which signifies softness in anything, such as a stick, able, or character. It is also used to describe a woman who is youthful and graceful.