Longford

English Wikipedia has an article on:

Longford (disambiguation)

Wikipedia

• (General American) IPA^(key): /ˈlɔŋfɚd/
• (Received Pronunciation) IPA^(key): /ˈlɒŋfəd/
• (cot–caught merger) IPA^(key): /ˈlɑŋfɚd/

From long +‎ ford.

Longford

1. A number of places in England:
   1. A village and civil parish in Derbyshire Dales district, Derbyshire (OS grid ref SK2137).
   2. A village and civil parish in Tewkesbury borough, next to Gloucester, Gloucestershire (OS grid ref SO8320).
   3. A small village in the borough of Hillingdon, Greater London, formerly in Middlesex, on the north side of Heathrow Airport (OS grid ref TQ0576).
   4. The Longford River, a man-made river in Greater London, flowing from the Colne at Longford to Bushy Park and Hampton Court Palace.
   5. A northern suburb of Coventry, West Midlands (OS grid ref SP3583).

From Irish an Longfort (literally “the camp, the stronghold”), anglicized to be identical to Etymology 1.

Longford

1. A county of Ireland.
2. A town, the county town of County Longford, Ireland.
3. An earldom in the Peerage of Ireland.