Everyone in the USA knows "Hillary" is a female first name, even more than "Elizabeth." But this woman, Emma Tobin from the Isle of Man married William Hillary who received a Baronetcy for organizing a militia, England's largest private army, to repel a possible invasion by Napoléon. According to his Wikipedia article, "...In 1813, he re-married (after presumably divorcing his first wife, as she did not die until 1828,[4]) this time to a local Manx woman, Emma Tobin..." This uncertainty presumably explains why she is not covered by an article in thepeerage.
He is credited with creating the Royal National Lifeboat Institution.
From magnoliabox.com/tag/Lady%20Anne.