Tiernan
Tiernan is the family name of the following people:
- Andrew Tiernan (born 1965), English actor
- Cate Tiernan (* 1961), American writer
- Fergus Tiernan (* 1982), Scottish football player
- Graham Tiernan (* 1952), German cameraman
- Mike Tiernan (1867-1918), American baseball player
- Robert Tiernan (1929–2014), American politician
- Jonathan Tiernan-Locke (* 1984), English cyclist
