In 1777 there drifted into British West Florida one Charles Percy, late of His Majesty’s army and an ambitious man. Born of dubious lineage in England or perhaps Ireland but claiming kin with the Northumberland Percys (“Harry Hotspur” of Shakespeare’s histories) Charles Percy had acquired a few hundred acres as bounty for his military service, and he used that, his hard work, and his family tree to settle in as a planter. He married, acquired yet more land, sided with the Loyalists, and became an alcalde, a magistrate, when the Spanish took over in 1781. Thus did Charles Percy become Don Carlos, and he prospered.
"Review Essay--Hope Among the Ruins: The Percy Family and the Southern Imagination,"
Florida Historical Quarterly: Vol. 75:
4, Article 5.
Available at: https://stars.library.ucf.edu/fhq/vol75/iss4/5