feowerteoða [OE]
fourtenthe [MI]
fourteenth [ME]
fourtínþ
https://www.etymonline.com/word/fourteenth#etymonline_v_40766
https://www.merriam-webster.com/dictionary/fourteenth
https://quod.lib.umich.edu/m/middle-english-dictionary/dictionary/MED17494
https://bosworthtoller.com/10480