Married to a princess Ypsilantis, Konstantin actively supported the Greek secret society Filiki Eteria and the military action of Alexander Ypsilantis in Moldavia and Wallachia.
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Ypsilantis was the brother of Alexander Ypsilantis, a leader of Filiki Eteria.
Charters by Ştefan Cantacuzino (1715), Grigore II Ghica (1748), Alexander Ypsilantis (1776) and Constantine Ypsilantis (1803) have been preserved, and there is direct evidence of donations by earlier voivodes like Matei Basarab.