Welcome - Cecily isn't terribly common here but I did look after one once who was an adorable child and grew up to join the circus .... (honestly!!!)
And Cecilia ( which is basically the same ) is quite famous for being the patron saint of music btw .... there is a Purcell Ode to her... "Hail, bright Cecilia!" and lots of paintings .... so it is a good name
