Carl Zethelius (1811–1860), mill owner and Royal Secretary.

Adolf Zethelius (born Erik Adolf Zethelius; 19 February 1781 – 7 March 7, 1864) was a Swedish silversmith and industrialist and owner of the Swedish ironworks Surahammars bruk [sv] and Nyby bruk.

[1] Works by Zethelius are also exhibited at Nationalmuseum and Hallwyl Palace in Stockholm.

Zethelius acquired the manor house Nyby, near Torshälla, from his father-in-law Eric Nordewall [sv], and in 1829 he founded the ironworks Nyby bruk on the site.

[2] Zethelius had the manor house of Surahammars herrgård [sv] constructed 1856–1858.