This is what was on Wikipedia about her:
Marga Boodts, (died 1976), claimed to be Grand Duchess Olga Nikolaevna of Russia. Boodts lived in a villa at Lake Como in Italy. Money supporting her was said to come from the Pope and Kaiser Wilhelm.[1] Olga's first cousin, Prince Sigismund of Prussia, was convinced of the authenticity of Boodts' claim. He introduced her to the Prince of Oldenburg, a Godson of the Kaiser, who lent her financial support. Most historians do not accept her claim.[2] Michel Wartelle a french canadian historian wrote a book including new testimonies from high rank people that Marga Boodts was really the Grand-Duchess Olga Nicolaievna, L'Affaire Romanov ou le mystère de la maison Ipatiev, Louise Courteau, Quebec, Canada,2008.
Believe who you will. Prince Sigismund's son, Alfred says that his father never met either woman. Having never met them, he was in no position to introduce either one to anyone.
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