Before 21 Dec 1532 [his father] James "Lame" Butler 9th Earl Ormonde 2nd Earl Ossory (age 31) and [his mother] Joan Fitzgerald Countess Ormonde and Ossory (age 23) were married. She the daughter of James Fitzgerald 10th Earl Desmond. He the son of Piers "Red" Butler 8th Earl Ormonde 1st Earl Ossory (age 65) and Margaret Fitzgerald Countess Ormonde and Ossory.

In Aug 1548 [his step-father] Francis Bryan (age 58) and [his mother] Joan Fitzgerald Countess Ormonde and Ossory (age 39) were married. She the daughter of James Fitzgerald 10th Earl Desmond. He a great x 4 grandson of King Edward III of England.

In 1550 [his step-father] Gerald Fitzgerald 14th Earl Desmond and [his mother] Joan Fitzgerald Countess Ormonde and Ossory (age 41) were married. No issue. A political marriage; the age difference being twenty-four years. She was the eldest daughter of [his grandfather] James Fitzgerald 10th Earl Desmond. The marriage brought a temporary truce to the Desmond and Ormonde factions. The difference in their ages was 44 years; she, unusually, being older than him. She the daughter of James Fitzgerald 10th Earl Desmond. He the son of James Fitzgerald 13th Earl Desmond. They were second cousins.

In Sep 1554 [his future brother-in-law] Henry Berkeley 7th Baron Berkeley (age 19) and Katherine Howard Baroness Berkeley (age 16) were married at Kenninghall, Norfolk. She by marriage Baroness Berkeley.

Around 1559 Thomas "Black Tom" Butler 10th Earl Ormonde 3rd Earl Ossory (age 27) and Elizabeth Berkeley Countess Ormonde and Ossory (age 24) were married. She by marriage Countess Ormonde, Countess Ossory. He the son of James "Lame" Butler 9th Earl Ormonde 2nd Earl Ossory and Joan Fitzgerald Countess Ormonde and Ossory (age 50).

On 09 Nov 1582 Thomas "Black Tom" Butler 10th Earl Ormonde 3rd Earl Ossory (age 50) and Elizabeth Sheffield Countess Ormonde and Ossory were married. She by marriage Countess Ormonde, Countess Ossory. He the son of James "Lame" Butler 9th Earl Ormonde 2nd Earl Ossory and Joan Fitzgerald Countess Ormonde and Ossory.

Around 1591 [his illegitimate brother-in-law] Robert Dudley (age 16) and Margaret Cavendish (age 21) were married. He the illegitmate son of Robert Dudley 1st Earl of Leicester and Douglas Howard Baroness Sheffield (age 49).

Around 1596 [his illegitimate brother-in-law] Robert Dudley (age 21) and Alice Leigh 1st Duchess Dudley (age 18) were married. He the illegitmate son of Robert Dudley 1st Earl of Leicester and Douglas Howard Baroness Sheffield (age 54).

On 09 Mar 1598 [his former brother-in-law] Henry Berkeley 7th Baron Berkeley (age 63) and Jane Stanhope Baroness Berkeley (age 51) were married at St Giles without Cripplegate Church [Map]. She by marriage Baroness Berkeley. She a great x 5 granddaughter of King Edward III of England.

Around 1600 Robert Dillon 2nd Earl Roscommon and [his future sister-in-law] Margaret Barry were married. He the son of James Dillon 1st Earl Roscommon (age 50) and Eleanor Barnewall.

In 1601 Thomas "Black Tom" Butler 10th Earl Ormonde 3rd Earl Ossory (age 69) and Eleanor Barry Countess Ormonde and Ossory were married. She by marriage Countess Ormonde, Countess Ossory. He the son of James "Lame" Butler 9th Earl Ormonde 2nd Earl Ossory and Joan Fitzgerald Countess Ormonde and Ossory. They were second cousin twice removed.

In 1606 [his illegitimate brother-in-law] Robert Dudley (age 31) and Elizabeth Southwell (age 22) were married at Lyon, France [Map]. Bigamous in his case since his second wife Alice Leigh 1st Duchess Dudley (age 28) was alive. She the daughter of Robert Southwell and Elizabeth Howard Countess Carrick (age 41). He the illegitmate son of Robert Dudley 1st Earl of Leicester and Douglas Howard Baroness Sheffield (age 64). They were first cousin once removed.

Around Sep 1614 [his son-in-law] Richard Preston 1st Earl Desmond and [his daughter] Elizabeth Butler were married. The King imposed this marriage on Black Tom, Elizabeth's father, who did not want the royal favourite for a son-in-law but could not oppose the King's will. She the daughter of Thomas "Black Tom" Butler 10th Earl Ormonde 3rd Earl Ossory (age 82) and Elizabeth Sheffield Countess Ormonde and Ossory.

In 1631 Thomas Somerset 1st Viscount Somerset (age 52) and [his wife] Eleanor Barry Countess Ormonde and Ossory were married. She by marriage Viscountess Somerset of Cashel. He the son of Edward Somerset 4th Earl of Worcester and Elizabeth Hastings Countess of Worcester.

David Barry and Elizabeth Power were married.

John Power and Eleanor Barry Countess Ormonde and Ossory were married.

Theobald Butler and [his daughter] Elizabeth Butler were married. She the daughter of Thomas "Black Tom" Butler 10th Earl Ormonde 3rd Earl Ossory and Elizabeth Sheffield Countess Ormonde and Ossory. They were first cousins.

[his son] Piers FitzThomas Butler and Catherine Fleming were married. He the son of Thomas "Black Tom" Butler 10th Earl Ormonde 3rd Earl Ossory.