John L. Dagg (1794–1884), American Baptist minister and theologian
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Archie Dagg, traditional fiddler, piper and composer from Northumberland
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Israel Dagg (born 1988), New Zealand international rugby union player
After retiring from farming, and settling first at Swindon, near Rothbury, and later at Rodsley Court, Rothbury, Dagg took to pipemaking, and particularly reedmaking, for which he became highly respected.
In 1998 the Fred Dagg Anthology CD was released by Columbia.