How many Royal Navy ships were named Defiance?

Did the Royal Navy use the name Defiant, and how many Defiances were there?

The Royal Navy used Defiance. The count given is thirteen entries, or nineteen vessels including ships renamed for torpedo-school duties.

Defiant is the name used in the film, while Defiance is the recurring Royal Navy name. The reference consulted gives thirteen entries under Defiance. Including ships renamed for torpedo-school duties raises the count to nineteen vessels. A count must therefore include the additional school ships that inherited the name.