What is the X in X-mas?
masc. proper name, introduced in England by the Normans, from Old Norse Hrolfr, related to Old High German Hrodulf, literally "wolf of fame" (see Rudolph). Rolfing (1972) as a deep massage technique is named for U.S. physiotherapist Ida P. Rolf (1897-1979), and first attested 1958, as Rolf Technique.
Rolfing Rolf·ing (rôl'fĭng)
A service mark used for a technique of deep muscular manipulation and massage for the relief of bodily and emotional tension.