From Shakespeare: House of York or house of York?

The House of York (capital H, capital Y) was a branch of the English royal House of Plantagenet, three members of which became English kings in the late 15th century.

Well, thanks for the Wiki look up. I was just curious, because I find myself second guessing things I write down, because they don’t look quite right sometimes. This happens to others, yes?

I look things up constantly as I write. Probably a third of my writing time is spent fact-checking, confirming the sense in which I’m using a word, verifying spelling of special terms and place names, and researching details for authenticity.

Capitalizing should be correct because you are using it as a collective proper noun, like House of Representatives rather than flock of sheep. Though some might argue those are the same things

House of York. Proper noun.

House, not house, because it’s a proper noun referring to the family or bloodline, not to the physical dwelling.

You guys are all awesome. I mean that sincerely. Especially @Jeruba.