Beloved lake or bitter waterfall
A modern American compound name combining Mia and Lynn. Mia is often derived from the Latin 'meus' meaning 'mine' or as a diminutive of Maria ('bitter' or 'beloved'), while Lynn is a Welsh-rooted name referring to a lake.
Less common today
Mialynn isn't in the latest US Top 1000. It last peaked at #6,916 in 2015.
US births per 5-year period, 1990βpresent (SSA data).