Dr Peter Hennis MD (c. 1802 – 18 May 1833) was a British physician.
[1] Hennis was born in Youghal, County Cork, Ireland.
During the city's cholera outbreak in 1832, he was appointed medical officer to the poorest South District of the city where he gained a reputation for kindness and hard work.
[3] In May 1833, Hennis had a disagreement with Sir John Jeffcott which resulted in a duel with pistols on 10 May.
Two hundred and fifty dignitaries attended his funeral service at the Cathedral and 20,000 citizens lined the route to St Sidwell's Church where he was interred, such was the depth of feeling toward him.