feowertyne [OE]
fourtene [MI]
fourteen [ME]
fourtien
https://www.etymonline.com/word/fourteen#etymonline_v_33373
https://www.merriam-webster.com/dictionary/fourteen
https://quod.lib.umich.edu/m/middle-english-dictionary/dictionary/MED17492
https://bosworthtoller.com/10488