Testing a theory

In the current absence of information on the parents of my 3rd-great-grandmother Bridget, I'm trying a theory using the traditional Irish naming pattern to see if that helps uncover some leads in Roscommon and Longford, Ireland.

Two blogs, English Ancestors (March 2020) and FamilyLocket (January 2025), provide a helpful guide to the naming pattern (see these blogs for the pattern). From the information that I have, Bridget had at least seven children: three with her first husband Patrick Dooner, and four with her second husband (my 3rd-great-grandfather) John O'Brien. From looking at the names of the children, and based on the facts that I have about Patrick Dooner's parents, it's possible Bridget and Patrick made some adjustments to the naming pattern.

Bridget and Patrick:

• John Dooner (possibly named after Bridget's father or Patrick's grandfather?)
• Hugh Dooner (Patrick's father was named Hugh or Bridget's father was also named Hugh, or they deviated from the naming pattern here)
• Michael J. Dooner (named after Patrick's uncle Michael or Bridget's father was Michael)

Bridget and John:

• Anna Maria O'Brien (possibly named after Bridget's mother?)
• Isabella O'Brien (possibly named after John's mother?)
• John J. O'Brien (either named after John's father or after John directly)
• Agnes O'Brien (named after Bridget's oldest sister?)

Using this naming convention, I'm looking for baptismal records about 1793 in or near County Clare for John with parents John O'Brien and Isabella, and in Longford for a Bridget born about 1824 with a father's name of John or Michael and mother Anne or Anna.