Passage: Stauffenberg's full name was Claus Philipp Maria Justinian, followed by the noble title of "Count of Stauffenberg". He was born in the Stauffenberg castle of Jettingen between Ulm and Augsburg, in the eastern part of Swabia, at that time in the Kingdom of Bavaria, part of the German Empire. He was the third of four sons including the twins Berthold and Alexander and his own twin brother Konrad Maria, who died in Jettingen one day after birth on 16 November 1907. His father was Alfred Klemens Philipp Friedrich Justinian, the last Oberhofmarschall of the Kingdom of Württemberg. His mother was Caroline Schenk Gräfin von Stauffenberg, née Gräfin von Üxküll-Gyllenband, the daughter of Alfred Richard August Graf von Üxküll-Gyllenband and Valerie Gräfin von Hohenthal.The titles "Graf" and "Gräfin" mean count and countess, respectively. Schenk (i.e., cupbearer/butler) was an additional hereditary noble title. The ancestral castle of the nobility was the last part of the title, which was Schenk Graf von Stauffenberg and used as part of the name. The Stauffenberg family is one of the oldest and most distinguished aristocratic Catholic families of southern Germany. Among his maternal Protestant ancestors were several famous Prussians, including Field Marshal August von Gneisenau.On 11 November 1919, a new constitutional law, as part of the Weimar Republic, abolished the privileges of nobility. Article 109 also stated, "Legal privileges or disadvantages based on birth or social standing are to be abolished. Noble titles form part of the name only; noble titles may not be granted any more."

Question: What religion is the family?
Catholic