Andrus is a male given name of Estonian origin, derived from the Old Norse name Ámundr, which is composed of the elements 'áinn' meaning 'only' and 'munder' meaning 'protection'. It is a variant of the name Amund, which has been used in Norway and Iceland. In Estonia, Andrus is a popular given name, often chosen for its traditional Estonian sound while still having international appeal due to its Scandinavian roots. The name Andrus has been used historically among Estonian nobility, with notable bearers including Andrus Ansip, a prominent Estonian politician who served as the Prime Minister of Estonia from 2010 to 2014.
The name Andrus experienced fluctuations in popularity over the past century, with peaks occurring in the late 1950s and early 2010s.