hundred [OE]
one hundred [ME]
oun hondred
https://www.etymonline.com/word/hundred#etymonline_v_16062
https://www.merriam-webster.com/dictionary/hundred
https://quod.lib.umich.edu/m/middle-english-dictionary/dictionary/MED21487
https://bosworthtoller.com/19938

two hundred [ME]
tu hondred
etc