Dry valley or from the forest settlement
Dreydon is a modern invented name, likely a phonetic variation of the English surname Drayton or a blend of names like Drew and Hayden. Drayton itself stems from Old English roots meaning 'dry town' or 'settlement near a portage'. It has gained some traction as a unique alternative to more popular '-den' ending names.
Less common today
Dreydon isn't in the latest US Top 1000. It last peaked at #6,575 in 2012.
US births per 5-year period, 1990βpresent (SSA data).