Wiktionary
twelth
a. (misspelling of twelfth English)
Usage examples of "twelth".
The twelth and thirteenth lines stepped forward and took their place, forming the barricade.
It was now her twelth jump, at a familiar distance, freighters streaming to and from Shanji with her guidance, Mengjai logging some forty light years of travel in less than one year real-time.
The ring was stolen from our London home, Metolius, while we were gone to our family estate in Wales from Michaelmas until Twelth Day.