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 Zainab mean?
Zainab (زينب, Zaynab) is traditionally the name of a fragrant flowering plant or tree; it is also parsed as containing zayn ('adornment, beauty'). It was borne by daughters and wives within the Prophet Muhammad's family, giving it strong historical standing. Variants include Zaynab and Zeinab.