whichsoever

pronoun or adjective

which·​so·​ev·​er ˌ(h)wich-sə-ˈwe-vər 

: whichever

… for he was either come post, or in the West Chester coach, I knew not which; but whichsoever it was, he would be sure to come to that house to meet me.

—Daniel Defoe

Word History

First Known Use

15th century, in the meaning defined above