    princess alexandra charlotte ulrike maryam virginia of hanover (born 20 july 1999) is the only child of hereditary princess caroline of monaco, heir presumptive to the monegasque throne, and prince ernst august, pretender to the throne of the defunct kingdom of hanover. she was born in vÃ¶cklabruck, upper austria.prince's palace of monaco. biography: hrh the princess of hanoverwillis, daniel a., the descendants of king george i of great britain, clearfield company, 2002, p. 73. isbn 0-8063-5172-1 alexandra was christened on 19 september 1999 in a ceremony at her father's hunting lodge auerbach, near grÃ¼nau im almtal, upper austria. her godparents are her paternal aunt alexandra, princess of leiningen, maternal half-sister charlotte casiraghi, ulrike ulmschneider, maryam sachs, virginia gallico, george condo, and eric maier. she was named after her godmothers. she has half-siblings from each of her parents' previous marriages. from prince ernst's previous marriage, she has two half-brothers, hereditary prince ernst august and prince christian of hanover. from princess caroline's previous marriage, she has two half-brothers, andrea and pierre casiraghi, and one half-sister, charlotte casiraghi. alexandra is the only one of princess caroline's four children who bears any style or title. she is formally styled as "her royal highness princess alexandra of hanover",prince's palace of monaco. biography: hrh the princess of hanover though the 
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