„Per pale azure above a viola Or, crossed hammer and pick Or and gules an errected horn Or sinister, all couped.“ The arms were granted in 1968 and show a horn, symbol of St. Cornelius, as the village historically belonged to the Kornelimünster Abbey. The miner's tools and the viola flower symbolise the mining of smithsonite in the region.
This image is taken from www.ngw.nl – Heraldry of the World –  an international civic heraldry site by Ralf Hartemink. ngw.nl/heraldrywiki/index.php?title=Eilendorf_(Aachen)

Landesarchiv NRW Abt. Rheinland - Kommunalheraldik und Wappenzentralkartei
Unknown authorUnknown author - constructed and added by Jürgen Krause