Joan Barnard

This individual's name is "Ann" on the company roster and on the 1848 Erin's Queen ship register.

The Ancestral File only lists "Joan" who was born in the same year as Ann. Find a grave and the death certificate also has her name as "Joan."

Their name is spelled "Bardner" on the roster but all other sources has their name spelled "Barnard."  Her surname is "Gibson" on the death certificate and Find A Grave website.