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 Noor mean?
Noor (نور, nur) means 'light' and comes from the Arabic root n-w-r. It is used for girls and boys across the Muslim world and carries connotations of radiance and divine light. Transliteration varies between Noor, Nour and Nur.