"Ancus Marcius (c. 677–617 BC ; reigned 642–617 BC) was the legendary fourth king of Rome. He was the son of Marcius (whose father, also named Marcius, had ...
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been a close friend of Numa Pompilius, who may be identified with Numa Marcius), and Pompilia (daughter of Numa Pompilius). According to Festus, Marcius had the surname of Ancus from his crooked arm (´ancus´ signifying ´crooked´ in Latin). Upon the death of the previous king, Tullus Hostilius, the Roman Senate appointed an interrex, who in turn called a session of the assembly of the people who elected the new king." - (en.wikipedia.org 27.10.2019)
