From what I understand, nobody knows exactly how Ancient Egyptians pronounced their vowels, so it's impossible to know the "correct" pronunciation. (See also:
https://en.wikipedia.org/wiki/Egyptian_language).
That being said, in English the transliteration of name should probably be pronounced phonetically: [meh-reet].
Alexandrina, Annabella, Clementine, Charlotte, Emilienne, Florence, Frederica, Katharina, Mary (May), Maud, Penelope, Rosamund, Theodora (Teddy).
Aubrey, Axel, Benedict, Bertrand (Bertie), Cuthbert, Dashiell, Everard, John (Jack) Leopold (Leo), Magnus, Matthias, Maximilian (Max), Wilfred.