Note 57 — THE BOOK OF THE DEAN OF LISMORE.
Thomas Maclauchlan translation
Ireland was divided into two great sections: the northern, called Leth Chuinn, or Conn’s half, from Conn of the hundred battles, King of Ulster; the southern, called Leth Mhogha, or Mogh’s half, called from Mogha Nuadhat, King of Munster, both in the second century.