English poet and theologian (1674-1748)
"No, Watts does not refer to a unit of power; that definition belongs to James Watt, while Isaac Watts was the English poet and theologian who lived from 1674 to 1748."
plural of watt
"The solar panels generated several hundred watts of electricity on a sunny afternoon."
A surname, from given names.
"The famous physicist had no relation to Thomas Watts, who was simply his cousin with a different family name."
The unit of power named after James Watt is not directly related to the surname "Watts," which originated as a patronymic form of the Middle English name Wat. This personal name was itself derived from Walter, meaning it simply indicated that someone was the son or descendant of a man named Wat.