Verostonos (or Vernostonus) was a god in ancient Celtic polytheism, worshipped in Roman Britain.His name links him to alder-trees. Altar-stones raised to him have been recovered in the United Kingdom, such as that at Ebchester in County Durham (RIB 1102, DEO VERNOSTONO COCIDIO VIRILIS GER V S L).https://romaninscriptionsofbritain.org/inscriptions/1102His association with Cocidius in that inscription suggests that he may have been linked with, or an epithet of, that more widely attested war god.
Vernostonos may be derived from the Proto-Celtic *Werno-stonos meaning 'the Groaning of Alder-trunks ' (cf. http://www.wales.ac.uk/documents/external/cawcs/PCl-MoE.pdf http://www.wales.ac.uk/documents/external/cawcs/MoE-PCl.pdf https://web.archive.org/web/20060211181501/http://www.indo-european.nl/cgi-bin/query.cgi?root=leiden&basename=%5Cdata%5Cie%5Cceltic).