I thought this was close but the more I look at it I find this is not a match obviously.
I too have an Ann Elizabeth Kenney who shows born in Woodslee Ontario December of 1850, shows as 9 years old in the 1861 census, and then in the 1871 census she isn't there. But there is nothing about internment at their church. So she may not have passed away. I can only assume by 1871 she was married off somewhere as she's be around 20.
If there is any relation I'd appreciate any help