Joanna I (March 1328 – July 1382), was Queen of Naples and Countess of Provence and Forcalquier from 1343 until her death. She also reigned as Princess of Achaea and claimed the crowns of Jerusalem and Sicily. During her long reign she was involved in numerous conflicts both internal and external. She was married four times.
Evelyn mentions her in passing during his visit to Avignon.
- Wikipedia for background, portrait.