I love the name Laelia. It's pronounced LIE-lee-a. The only thing I'd be a bit worried about is that people would pronounce it all kinds of ways and that it would get confused with similar names like Lilia, Livia or Lydia.
My name is Laelia- my dad, who is a horticulturist, named me after his favorite species of orchid. Mine is pronounced like this: "Lail-lee-uh". I have seen online all possible pronunciations. My dad always said my name was a "double-diphthong" because of the vowels "ae" forming a combination of sounds. Between the two "l"s the "ae" takes on the sound "L-ay-el" which when said together makes the English "lail" sound. But I have read two different opinions that the Latin pronunciation (Laelia is originally Roman) of an "ae" takes on both the "i-eee" sound (as in the word "eye" or the short "e" sound as in "set". So, my name could originally have been pronounced "L-eye-lee-uh" or "Lel-lee-yah" Many languages around the world have variations of this name too- I have met people from Persia, Latin America, Europe, who all say they have versions of Laelia in their languages! So, basically there are a lot of pronunciations! (Mine is the best, though-heehee).
Laelia probably means "lunar". It is the part of a puzzling alchemical inscription (Aelia Laelia Crispus) found in Bologna, which some have theorized is a representation of two beings (Aelia and Laelia) who are united in a single subject, Crispy "curly", with Aelia being "solar" and Laelia being "lunar" while Crispus, a combination of both, is the basic of all life: neither man or woman, a mixture of both.