Hollow valley or camp of the Danes
Cashden is a modern English invention, likely created by blending the popular name Cash with the trendy '-den' suffix found in names like Hayden or Camden. Etymologically, it draws from the Latin 'capsa' (case/box) via the English 'Cash', or the Old English 'denu' meaning valley.
Less common today
Cashden isn't in the latest US Top 1000. It last peaked at #8,720 in 2018.
US births per 5-year period, 1990βpresent (SSA data).