What does Layan mean?
Layan (ليان) comes from the Arabic root l-y-n ('to be soft'), carrying the sense of softness, gentleness and an easy, comfortable life. Some sources add a secondary 'ease/prosperity of living' nuance.
What does Khadija mean?
Khadija (خديجة, Khadija) is classically explained from the root kh-d-j with the sense of an 'early' or premature birth. Its prominence comes above all from Khadija bint Khuwaylid, the first wife of the Prophet Muhammad and the first person to accept Islam, so the name's religious and historical weight dominates its everyday meaning.