Arabella is from the Latin orabilis ("yielding to prayer, entreatable") — also interpreted as the Italian ara bella ("beautiful altar"). First used as a feminine given name in 12th-century Scotland and England. A top-200 US baby name since 2010. Arabella Churchill (1648-1730) — mistress of King James II of England and ancestor of the Duke of Berwick line; great-great-grandmother of John Churchill, 1st Duke of Marlborough — making her an ancestor of Winston Churchill and Diana, Princess of Wales. Arabella Churchill (1949-2007) — co-founder of the Glastonbury Festival (1971), the largest greenfield music and performing-arts festival in the world; granddaughter of Sir Winston Churchill. *Richard Strauss's Arabella (1933) — German romantic comic opera with libretto by Hugo von Hofmannsthal; among Strauss's most-performed late operas. Arabella Kushner (born 2011) — eldest daughter of Ivanka Trump and Jared Kushner; granddaughter of Donald Trump. Arabella Weir — Scottish actress and comedian. Arabella in Daphne du Maurier's My Cousin Rachel (1951). Arctic Monkeys' "Arabella" (2013) — track from their AM album, certified Platinum in the UK. Henry Fielding's The History of Tom Jones, a Foundling (1749)* features Mrs. Western's niece Arabella Hunt.
Featured throughout English aristocratic naming traditions.
In Pythagorean numerology the letters of Arabella reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.