O'Rourke
I am surprised there are no meanings listed for this common name. It is irish.
Replies
This database isn't all that big yet. Try answers.com.
from Oxford University Press "American Family Name Origins"
O'Rourke
Irish: Anglicized form of Gaelic Ó Ruairc ‘descendant of Ruarc’, Old Gaelic Ruadhrac, a personal name from Norse Hrothrekr (see Roderick). This is the name of chieftain family in counties Leitrim and Cavan.
Roderick
1. English: from the personal name Hrōdrīc, composed of hrōd ‘renown’ + rīc ‘power(ful)’, Old Norse form Hroþrekr. This name was in use among the Normans in the form Rodric, but was not frequent in the medieval period.
2. Welsh: Anglicized form of the personal name Rhydderch, originally a byname meaning ‘reddish brown’.
from Oxford University Press "American Family Name Origins"
O'Rourke
Irish: Anglicized form of Gaelic Ó Ruairc ‘descendant of Ruarc’, Old Gaelic Ruadhrac, a personal name from Norse Hrothrekr (see Roderick). This is the name of chieftain family in counties Leitrim and Cavan.
Roderick
1. English: from the personal name Hrōdrīc, composed of hrōd ‘renown’ + rīc ‘power(ful)’, Old Norse form Hroþrekr. This name was in use among the Normans in the form Rodric, but was not frequent in the medieval period.
2. Welsh: Anglicized form of the personal name Rhydderch, originally a byname meaning ‘reddish brown’.