Please note this listing from the Scottish Tartans Authourity.

The Clan Claus Society was formed on 1st June 2008 on the authority of 'Santa Claus' and this tartan was introduced for him and his extended family. Red is the traditional colour for Santa Claus. Green is for the evergreen holly & mistletoe which represent Christmas traditions. The three bands of yellow represent the three bags of gold that St. Nicholas gave the three daughters of the merchant. The two bands of white are for purity and the snow of the North Pole. Weaving restricted to Fraser & Kirkbright of Vancouver.

emphasis mine.