Arch is a shortening of the name Archer (English).
Arch is also a shortening of the name Archibald (English and Scottish).
Arch is also an English shortening of the name Archie (German, English, and Scottish).
Arch is uncommon as a baby name for boys. At the modest height of its usage in 1901, 0.015% of baby boys were named Arch. Its ranking then was #467. The baby name has since fallen out of favor, and is now of sporadic use. Within the group of boy names directly related to Arch, Archer was the most widely used in 2018.
† Pronunciation for Arch: AA as in "odd (AA.D)" ; R as in "race (R.EY.S)" ; CH as in "cheese (CH.IY.Z)"