þusend [OE]
thousand [MI]
þaosand
https://www.etymonline.com/word/thousand#etymonline_v_13254
https://www.merriam-webster.com/dictionary/thousand
https://quod.lib.umich.edu/m/middle-english-dictionary/dictionary/MED45417
https://bosworthtoller.com/32337

mille [L]
millione [IT]
million [OF]
milhon
https://www.etymonline.com/word/million#etymonline_v_16171
https://www.collinsdictionary.com/us/dictionary/italian-english/milione
https://anglo-norman.net/entry/milion
https://latin-dictionary.net/definition/26916/mille-millesimus

billion [FR]
bilhon
https://www.etymonline.com/word/billion#etymonline_v_11160
https://www.merriam-webster.com/dictionary/billion
https://www.larousse.fr/dictionnaires/francais-anglais/billion/9228

trilione [IT]
trillion [FR]
trilhon
https://www.etymonline.com/word/trillion#etymonline_v_17826
https://www.collinsdictionary.com/us/dictionary/italian-english/trilione
https://www.larousse.fr/dictionnaires/francais-anglais/trillion/1014785