The story
- Italian · derived frommartello“hammer”
- Corsican · borrowed fromTorra di Mortella
- English todayMartello tower
From a corruption of Corsican Torra di Mortella (literally “Tower of Mortella”), a tower in Corsica which was used as the basis for the design; possibly influenced by Italian martello (“hammer”).
Etymology from Wiktionary, CC BY-SA 4.0.