Pearl or bitter
A modern spelling variation of Megan, which is a Welsh diminutive of Margaret. It ultimately derives from the Greek word 'margarites' meaning pearl, though some etymologies link it to the Hebrew name Mary, meaning bitter.
Less common today
Meeghan isn't in the latest US Top 1000. It last peaked at #9,599 in 1990.
US births per 5-year period, 1990βpresent (SSA data).