I went looking on Famsearch looking for marriages and baptisms of Kennellys at Ardagh.

Johanna Kennelly married Daniel Finn in 1865, she was a daughter of Michael.
Mary Kennelly married Patrick Singleton in 1866, she was a daughter of John.
Margaret Kennelly (age 32) married Patrick Shanahan in 1865, she was a dau of Martin.
Catherine Kennelly (age 27) married James Fleming in 1866, she was a daughter of James.

In the 1860s and 1870s at Ardagh Kennellys having children baptised were:
Jeremiah Kennelly and Johanna Keating; Michael Kennelly & Margaret Reidy; Michael Kennelly & Mary Mullane; Michael Kennelly and Mary O'Carroll; Michael Kennelly and Catherine Cunningham; Catherine Kennelly and Patrick Kelly; Catherine Kennelly and Thomas Duanne; Ellon Kennelly and Thomas Enright; Honora Kennelly and John Cusack; Honora Kennelly and Patrick Garvan; Johana Kennelly and Daniel Finn; Mary Kennelly and Thomas Lynch; Mary Kennelly and John Slattery.

Some of them surely must be siblings of Bridget ..