[5] According to historian William Arthur Jobson Archbold, O'More "early acquired the character of a violent and successful chieftain.

[1] Upon Connell's death in 1537, a dispute broke out between Rory, Lysaght, Kedagh, and their uncle Peter, who was the Tanist in line to head the family.

[1] Peter O'More was for the time a friend of the Butlers - consequently, Lord Deputy Leonard Grey supported Connell's sons.

In June 1538, in the presence of the local army commander, Rory attempted to kill Peter at Athy, County Kildare.

[1] In the early 1540s, Rory O'More's brother Giolla Pádraig set about his plan to seize the lordship of Laois.

[1] Giolla Pádraig and O'Connor Faly were favoured by the new Lord Deputy, Anthony St Leger.

[1] St Leger forced O'More and his brother to submit to the authorities, bringing them to Dublin in hopes of stopping their bloodshed.

[4][5] Rory Caoch O'More's brother Kedagh left a son, who, in 1565, petitioned the privy council in Dublin to be restored to his father's inheritance.

In a grant afterwards made to his eldest son, his services to King Edward VI are spoken of; but an order of 15 March 1550-1 forbade any of the name of O'More to hold land in Laois.