Chest or box
Kasten is a Germanic surname-turned-given-name derived from the Middle High German word 'kaste', referring to a chest, box, or granary. It likely originated as an occupational name for a maker of chests or a manager of a granary. In some instances, it may also be a shortened form of Karsten, a Low German variant of Christian.
Less common today
Kasten isn't in the latest US Top 1000. It last peaked at #4,490 in 2012.
US births per 5-year period, 1990βpresent (SSA data).