How To Spell who's?

Correct spelling: who's

Google Ngram Viewer results for who's:

This graph shows how "who's" have occurred between 1800 and 2008 in a corpus of English books.

What are the usage examples for who's?

  1. Who's the young man who followed him out?" – The Eye of Dread by Payne Erskine
  2. Who's that gentleman gone up- stairs? – Ten Thousand a-Year. Volume 1. by Samuel Warren