Mountain; of the mountain
A modern American creation likely blending the prefix 'De-' with the French word 'montagne' or the name Monte. It conveys a sense of strength and stability associated with high peaks.
Less common today
Demontay isn't in the latest US Top 1000. It last peaked at #4,871 in 2002.
American college basketball player
US births per 5-year period, 1990βpresent (SSA data).