Everything you need to know about the Irish surname O'Sullivan - its meaning, origins, interesting facts and famous people with the last name O'Sullivan.

Irish derivation: Ó Súilleabháin.

Name meaning: "Descendant of the hawk/dark eyed one."

Counties associated with the name: Cork, Clare, Galway, Kerry, Limerick, Tipperary, and Waterford.

Coat of arms motto: The steady hand to victory.

Interesting facts:

- The term “Manifest Destiny” was coined by a journalist named O’Sullivan, who supported the expansion of the United States into the western territories.

- The father of the skyscraper was a Sullivan who also originated the famous architectural axiom "form follows function."

- The great Chicago Fire of 1871 was started by a Sullivan.

- The first tank ever acquired by the state of Israel was a gift from an O'Sullivan.

- The first heavy weight boxing champion of the world was a Sullivan.

- The man hit by the most lightning strikes was a Sullivan.

- First American woman ever to walk in space was a Sullivan.

Some famous O'Sullivan’s:

- Maureen O'Sullivan (1911-1998, Irish born actress)

- Denis O'Sullivan (b.1948, Irish golfer)

- John Francis O'Sullivan (1850-1911, Irish-American awarded the medal of honor during the Indian Wars)

- Ed Sullivan (1901-1974, American television personality)

- Anne Sullivan (1866-1936, Teacher of Helen Keller)

Here are some interesting facts about the Irish last name O'Sullivan, including its history, family crest, coat of arms, and famous clan members.