HMS Hydra (A144) the first commission of HMS "Hydra". She was decommissioned and sold to the Indonesian Navy in 1986 and renamed KRI "Dewa Kembar" (Pennant Number 932); she was still in service in 2006. There have been eight ships of the name in the Royal Navy, named for the Hydra of Greek Mythology, a serpent with many heads (though nine is generally accepted as standard), the centre one of which was immortal. The monster was overcome and slain by Hercules. The ship's badge of HMS "Hydra" depicts the monster with seven heads. The ship's motto was "Ut Herculis Perseverantia" ("Like Hercules Persevere").
Heracles of Macedon Heracles of Macedon Heracles of Macedon (; c. 327 – 309 BC) was a reputed illegitimate son of Alexander the Great of Macedon by Barsine, daughter of Satrap Artabazus of Phrygia. Heracles was named after the Greek mythological hero of the same name, from whom the Argeads claimed descent. It cannot be established definitively whether Heracles was Alexander’s son or not. Of the ancient sources, both Plutarch and Justin mention Barsine and Heracles but Arrian in the Alexander's Anabasis mentions neither. Plutarch recounts that Alexander took Barsine as his mistress, but on the arguably spurious grounds that she was recommended