From Wiktionary, the free dictionary
Attested as Rys Dam in 1680. Compound of rijs (“brushwood”) and dam (“dam”). Named after a former dam. Compare Rijsdam.
Risdam n
- A neighbourhood of Hoorn, North Holland, Netherlands
- van Berkel, Gerard, Samplonius, Kees (2018) “risdam”, in Nederlandse plaatsnamen verklaard[1] (in Dutch), Mijnbestseller.nl, →ISBN