fourteenth (adj., n.)

"next in order after the thirteenth; an ordinal numeral; being one of fourteen equal parts into which a whole is regarded as divided;" c. 1300, fourtenethe; see fourteen + -th (1). By influence of fourteen, replacing or modifying fourtende, fowrtethe, from Old English feowerteoða, Old Norse *feowertandi "fourteenth." Compare Dutch veertiende, German vierzehnte.