donderblad

Etymology
From, with a by-form (whence the modern obsolete synonym ). , perhaps from a folk belief that these plants protected against thunder (as they were commonly planted on roofs: compare the synonyms, and other variants, as well as the taxonomic name, tēctōrum meaning "of roofs").

If donderbaert (attested also in 🇨🇬) is the original form underlying donderblat, it may be compared with, from (or ) which literally means. If this association is correct, the word could be viewed as a calque of the Latin, with referring to the Germanic thunder god similar to how  was calqued into the Germanic languages using this deity's name (see the etymology at ). The original meaning would then be "Donar's beard".