What does Salma mean?
Salma (سلمى, salma) comes from the Arabic root s-l-m ('peace, safety, soundness') - the same root as salam and Islam - and means 'safe, peaceful, unharmed'. It is a classical name used in early Arabic poetry.
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.