Here is a translation of Sir Gawaine and the Green Knight, mostly translated,
but with quite a few untranslated words underlined, so that if you can't guess
what they mean, clicking on the underlined word brings up a glossary.
I hope you find it as much fun as I did.

http://www.livinghistory.co.uk/homepages/sirgawain/mytext.html

Well, this is the first I've heard of 'hat' meaning 'called'. I like the alliteration of this poem.

Dear Jackie: in all the stories about knights "hight" means "he was named (or called).
hight 7hjt8
adj.
5ME highte, merging OE hatte, pass. pt. with heht, active pt. of hatan, to command, call: confused in sense with ME hoten, pp. of same v.: akin to Ger heissen < IE base *kci3, to move6 [Archaic] named; called !a maiden hight Elaine"