Fergus \f(e)-rgus, fer-gus\ as a boy's name is pronounced FER-gus. It is of Scottish, Irish and Gaelic origin, and the meaning of Fergus is "supreme man; highest choice". From Fearghas. Saint Fergus the Pict (eighth century) was an Irish missionary in Scotland.

Fergus has 6 variant forms: Fearghas, Fearghus, Feargus, Fergie, Ferguson and Fergusson.

For more information, see also the related name Ferris.