Wikipedia
Halladay
Halladay is a surname which may refer to:
- Daniel Halladay (born 1826), American engineer, inventor and businessman
- Howard Hadden Halladay (1876–1952), Canadian politician
- Roy Halladay (born 1977), American retired Major League Baseball pitcher
Halladay (automobile)
The Halladay Motor Car company was founded in 1905 in Chicago, Illinois, and moved to Ohio in 1917.