— July 22, 1611;[note 3] Tsardom of Russia[1][2][3]) was a prominent 17th century Russian nobleman (dvoryanin), voivode (military chieftain) of, allegedly, a Rurikid origin who practically became a head of Pereyaslavl-Ryazansky lands nobility in the end of 1590s; he took part in wars during power vacuum in succession crisis that happened in early 1598 in Tsardom as result of confusion about legitimate heir apparent following death of Feodor I, nobility infighting, war declared by Polish–Lithuanian Commonwealth (PLC) in 1605, and exhaustive Tatar raids; most famously he is remembered for organizing and leading the first unsuccessful uprising against occupation of Moscow of 1610 by PLC in April of 1611.

[2][5] In April of 1611 Prokopy along with his strong men, Duke Dmitry Troubetskoy, and Cossacks Ataman Ivan Zarutsky led the First People's Opolcheniye [ru] (FPO) in an attempt to expel Polish forces from occupied Moscow dying not long after that.

[4]: 835 [10] After Battle of Dobrynichi in 1605 under leadership of Fedor Sheremetev, Prokopy with his son Vladimir were sent to Kromy as voivide (not far from Orel, where Lisowczyks were expected) to ward off Polish and Zaporozh Cossack forces.

[6][7][9] During February-March, 1608, Lyapunov led an army of Ryazan, Arzamas, and Muscow voivodes against peasants who rose in revolt in Pronsk against Vasili IV Shuisky (which was allegedly instigated by Aleksander Józef Lisowski and his ragtag mercenaries and supporters of False Dmitriy II)[4] In late spring Prokopy L., with his brother Zakhary P. L., and Viceroy of Ryazan Ivan Andreyevich Khovansky unsuccessfully besieged Pronsk (at the time occupied by mercenaries of Lisowski) in the Battle of Zaraisk 1608 [ru].

In late 1610 Prokopy set off to retake Pronsk (again) in the name of Władysław IV to whom he just pledged his allegiance;[4][3][4]: 835  Dmitry Pozharsky came to a help from Zaraisk (where he served as a voivode) and they together left for Pereyaslavl Ryazansky.

[13] In the summer of 1611, Prokopy Lyapunov practically became the head of so called «Council of all lands» (Russian: Совет всей земли), an interim government, called to establish an order and as result of which, on June 30, he issued a decree that reinstated certain serf regulations and violated his own promises to Cossacks of "freedom and salary" (as they tended to plunder surroundings where they stayed); by another one Prokopy L. also imposed harsh punishment on looters to prevent unauthorized collection of taxes and duties; this contributed to further disintegration of his movement.

[note 3][6][16][4]: 835 Body of Prokopy Lyapunov was reportedly buried at Temple of Prophet Elijah on Vorontsov Field [Wikidata],[18] but at some point later reburied at Trinity Lavra of St. Sergius by his son Vladimir, along with many other prominent figures who lived at the Time of Troubles (e.g. Dmitry Troubetskoy).

[18][19][20][21][22] Some remains of FPO, primarily Cosscaks loyal to ataman Ivan Zarutsky continued to fight with Poles, but some have joined Dmitry Pozharsky troops at Yaroslavl to form Second People's Opolcheniye [ru] preparing for the Battle of Moscow (1612).