It is named after Saint Seachnall, who established a church there in the 5th century.
On 13 February 2010, Pope Benedict XVI appointed him Apostolic Nuncio to Madagascar and Apostolic Delegate to the Comoros (papal representative to the Catholic communities in both countries but accredited only to the government of Madagascar) and Titular Archbishop of Domnach Sechnaill (Dunshaughlin) County Meath, Ireland.
Walker was the son of Thomas Walker, Master of the Workhouse at Dunshaughlin and Ann Delany of Clavistown Mills, Killmessan, County Meath.
The National Development Plan included a large expansion in commuter services, especially in the greater Dublin area, and so the company greatly increased services on routes such as Dublin/Drogheda/Dundalk, Dublin/Ashbourne, Dublin/Ratoath, Dublin/Dunshaughlin/Navan/Kells/Cavan.
By Restitutus she was mother of Saint Sechnall of Dunshaughlin; Saint Nectan of Killunche, and of Fennor (near Slane); of Saint Auxilius of Killossey (near Naas, County Kildare); of Saint Diarmaid of Druim-corcortri (near Navan); of Dabonna, Mogornon, Drioc, Luguat, and Coemed Maccu Baird (the Lombard) of Cloonshaneville, near Frenchpark, County Roscommon.
Bus Éireann route 109 provides two journeys a day in the morning to Kells via Dunshaughlin and Navan and two return journeys in the evening.
Killeen Castle, Dunsany is a castle near Dunshaughlin, County Meath, Republic of Ireland.