Bridget "Biddy" Early (née O'Connor or Connors; 1798 – 1872) was a traditional Irish herbalist who helped her neighbours. She acted against the wishes of the local tenant farmer landlords and Catholic priests and was accused of witchcraft.
Biddy Rockman Napaljarri is a Walpiri-speaking Indigenous artist from Australia's Western Desert region. She has been painting since 1986, and her work is in the collection of the National Gallery of Victoria.
Biddy Mason (1818 – 1891) was an African-American nurse and a Californian real estate entrepreneur and philanthropist. She was one of the founders of the First African Methodist Episcopal Church in Los Angeles, California. Enslaved upon birth, she developed a variety of skills and developed knowledge of medicine, child care, and livestock care. A California court granted her and her daughters freedom in 1856.
I believe they call the little girl in Sinclair Lewis's "Kingsblood Royal" Biddy. She's a pretty annoying little girl who uses her dog's name (an inappropriate name in itself) in inappropriate ways (i.e. calling the hired help by it).