Welin is a surname that may refer to: Anna Welin (born 1994), Swedish footballer. Axel Welin (1862–1951), Swedish inventor. Welin breech block, design for locking artillery breeches invented by Axel Welin. Gustaf Welin (1930–2008), Swedish Army lieutenant general. Johanna Welin (born 1984), Swedish-born German wheelchair basketball player. Karl-Erik Welin (1934–1992), Swedish pianist and composer. See also. Welin (village), Walloon name of the village/municipality of Wellin, Belgium
https://en.wikipedia.org/wiki/Welin