Firstly, after Malcolm III Canmore, King of Scots. He annexed some of Northumbria and Strathclyde, and made the language of his court Saxon. His wife was Queen, now Saint, Margaret. He replaced the Celtic Church with the Catholic Church as the established church of the realm. he also abolished the tradition of Tanistry, by which the King was eleced by a council of nobles, and replaced it with Primogeniture so that it was the kingship was hereditary (I prefer both the Celtic Church, which is much older than the Catholic; and Tanistry of Pictish origins I believe)

Secondly, it is after my Christian name, Malcolm, and I want to be King, so King Malcolm seemed sensible.