The first element Trit originates either from the Old East Norse dialect þryzker itself from Old Norse þrjózkr ("defiant"); compare with modern Swedish noun trots ("defiance"); meaning "the defiant one" [5] or from the Old Norse þróttr ("force", "power"); compare with modern Icelandic noun þróttur ("vigor", "force"); meaning "the strong one".
The second element ton originates from either Old English tūn or Old Norse tún, both sharing the same meaning ("enclosure", "settlement", "farm").
[6] The name occurs in Stapylton's Rolls of the Norman Exchequer and in the ''Mémoires des Antiquaires de Normandie'' [fr] as holding lands in the neighborhood of Falaise and Bayeux in Normandy (France) as well as in the counties of Kent and Essex in England during the period covering the end of the 11th Century to the beginning of the 13th Century.
[7] The surname also appears in the Lancashire Pipe rolls in the year 1203 with a certain Walter de Tritton, the latter being mentioned as owing half a mark "to be acquitted from an appeal, probably of murder".
The Scandinavian and later Norman origins of the name are also reinforced by several hypotheses among which we can cite the etymology of the Norwegian parish of Tretten, the existence of the German village of Trittenheim taking its roots from a Norsemen settlement on the edge of the river Moselle during the Viking raids in the Rhineland or also the italian surname Trittoni of Italo-Norman origin taking its roots from the Norman conquest of southern Italy.