The story
Named according to the inventor, Halldór Úlfarsson from Iceland, who developed the instrument in late 2000s while studying at University of Art and Design Helsinki.
Etymology from Wiktionary, CC BY-SA 4.0.
halldorophone
Today it means: An electroacoustic string instrument, the sound of which makes use of electro acoustic feedback to produce drones and otherwise resembles a cello. Full definition →