His son, Conor, was a councillor from 1991–99 and his brother, Johnny, lost his seat in the 2004 local elections ending the McGahon family's 108 consecutive year representation on Dundalk Town and Louth County Council.
He headed the poll in his ward when elected to the seat vacated by his father Brendan McGahon, a controversial Teachta Dála (TD) for the constituency of Louth from 1982 until 2002 and became the youngest local politician in the Republic of Ireland when first elected in 1991 and the fifth consecutive member of his family to sit on the County Council.
Brendan Behan | Brendan Fraser | Brendan Perry | Brendan Byrne | Brendan O'Carroll | Brendan Benson | Brendan Coyle | Brendan Bowyer | Brendan Joyce | David Brendan Hopes | Brendan Steele | Brendan Shine | Brendan Shanahan | Brendan O'Leary | Brendan Nelson | Brendan Keyes | Brendan I. Koerner | Brendan Grace | Brendan Gleeson | Brendan Dolan | Brendan Beiser | Brendan | Brendan Taylor | Brendan Taman | Brendan Sexton III | Brendan O'Brien (music producer) | Brendan O'Brien | Brendan McKay | Brendan Hughes | Brendan Graham |