Lay arahants mentioned in the Pali Canon Following are the instances of Lay Arahants that I'm aware of;


Uggasena the acrobat
Santati the King Pasenadi's Minister
King Suddodhana [Looking for reference]


 What are the other instances of lay arahants (excluding Paccekabuddhas)  in the  recorded history?
Ven Bahiya.  Buddha proclaimed him great disciple of fast learner of Dhamma.  He reached enlightenment while was a lay person, however, he was killed while looking for personal items to join the Sangha.  Buddha classified him as one of the 41 great Bhikku.