pronoun; objective whom·so.
Examples from the Web for whoso
Whoso sheddeth man's blood, by man shall his blood be shed: for in the image of God made he man.The Story of Noah's Ark From the Bible’s Book of Genesis|The Daily Beast|March 24, 2014|DAILY BEAST
For whoso will buy the diamond it is needful to him that he know them.The Travels of Sir John Mandeville|John Mandeville
But whoso is heroic will always find crises to try his edge.Essays, First Series|Ralph Waldo Emerson
For whoso waits imploring, yet sees need Of his prompt aidance, sets himself prepar'd For blunt denial, ere the suit be made.The Vision of Purgatory, Complete|Dante Alighieri