Trying to think of middle name for Felicity. Four syllable word name that ends in -ee sound and strong L sound.
Word middles like Grace and Hope are off
Middle names like Anne makes Felicity into Felicitian
Longer names are out
Two syllable names like Charlotte and Beatrice are out, otherwise you got really long name in letter count.
Many lovely names are out due to similar L sounds. Felicity Giselle or Felicity Helena both strong on L.
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Do you feel thinking of middle for any other name is as hard