Only possible baptism I could find but not in the Brosna area
Area - KERRY (RC) , Parish/Church/Congregation - GLENFLESK
Baptism of MARGARET BROSNOHAN of KNOCKINIGHOUN on 17 January 1862
Name MARGARET BROSNOHAN
Date of Birth 17 January 1862 (BASED ON OTHER DATE INFORMATION)
Address KNOCKINIGHOUN
Father TIMOTHY BROSNOHAN
Mother MARY LEARY
Just a thought obit states native of Killarney Brosna would not be considered in the Killarney area .What is your source for Brosna ?