In 1232, the troops of the Murom and Grand Principality of Ryazan took part in the campaign of the Grand Prince of Vladimir-Suzdal princes to the Mordvins, but it is not known whether Yaroslav took part in this campaign  .
After the fall of 1237 the Prince of Murom Yuri Davydovich was killed in the Battle of Voronezh River during the campaign of Batu Khan against Kievan Rus'. He was succeeded in Murom by his son Yaroslav.
Nothing is known about Yaroslav’s sons. In 1345, the death of Murom Prince Vasili Yaroslavich, who was replaced by brother Yuri, was mentioned. In the “Velvet Book” they are called the sons of Yaroslav Yuryevich. However, researchers have doubts that the princes who lived 80 years after Yaroslav could have been his sons. It is more likely that Vasili Yaroslavich and Yuri Yaroslavich were the great-grandchildren of Yaroslav Yuryevich.
|Mariya Yaroslavna of Murom (1232-1297)||1232||1297||Boris Vasilkovich of Rostov (1231-1277)|
|Yuri Yaroslavich (c1235-c1280)||1235||1280|