twentig [OE]
twenti [MI]
twenty [ME]
tɯonty
https://www.etymonline.com/word/twenty#etymonline_v_18865
https://www.merriam-webster.com/dictionary/twenty
https://quod.lib.umich.edu/m/middle-english-dictionary/dictionary/MED47465
https://bosworthtoller.com/31206

twenty one [ME]
tɯonty oun

twenty two [ME]
tɯonty tu

etc