twa, twegen, tu [OE]
two [MI]
tu
https://www.etymonline.com/word/two#etymonline_v_18883
https://www.merriam-webster.com/dictionary/two#dictionary-entry-1
https://www.merriam-webster.com/dictionary/two#dictionary-entry-2
https://www.merriam-webster.com/dictionary/two#dictionary-entry-3
https://quod.lib.umich.edu/m/middle-english-dictionary/dictionary/MED47539
https://bosworthtoller.com/31110
https://bosworthtoller.com/031196