Yakov Mikhailovich Yurovsky was the eighth of ten children born to Chaim, son of Izka, a glazier, and his wife Ester daughter of Moishe (1848–1919), a seamstress. He was born on 19 June [O.S. 7 June] 1878 in the Siberian city of Tomsk, Russia. The Yurovsky family was Jewish. While the young Yurovsky was raised as a Jew, his family seemed to have later attempted to distance themselves from their Jewish roots. This may have been prompted by the prejudice toward Jews frequently exhibited in Russia at the time,[1] which included antisemitic pogroms in the empire. Shortly before fully devoting himself to the cause of revolution, in the early twentieth century, Yurovsky converted to Lutheranism.[1]

https://en.wikipedia.org/wiki/Yakov_Yurovsky

I couldn't find the names of the individual members of the Ural Regional Soviet that ordered the execution of the family but here is their pic thoughts? https://en.wikipedia.org/wiki/Murder_of_the_Romanov_family#/media/File:Presidium_of_the_Ural_Regional_Soviet.webp

(http://www.autoadmit.com/thread.php?thread_id=5758254&forum_id=2Reputation#49156447)

Sverdlov was born in Nizhny Novgorod as Yakov-Aaron Mikhailovich Sverdlov[3] to Jewish parents, Mikhail Izrailevich Sverdlov and Elizaveta Solomonova. His father was a politically active engraver who produced forged documents and stored arms for the revolutionary underground. The Sverdlov family had six children: two daughters (Sophia and Sara) and four sons (Zinovy, Yakov, Veniamin, and Lev). After his wife's death in 1900, Mikhail converted with his family to the Russian Orthodox Church, married Maria Aleksandrovna Kormiltseva, and had two more sons, Herman and Alexander.

https://en.wikipedia.org/wiki/Yakov_Sverdlov

(http://www.autoadmit.com/thread.php?thread_id=5758254&forum_id=2Reputation#49156468)

This guy was also heavily involved:

Born 9 March [O.S. 26 February] 1876 in Nevel to a family of Jewish contractors, his middle name has been spelt as, Isai (Yiddish: Shaya or Shai) and Isak, Isayevich, Isaakovich, Itskovich are indicated as real names. After graduating from a dental school in Riga, Goloshchyokin worked for a time as a dental technician.

https://en.wikipedia.org/wiki/Filipp_Goloshchyokin

(http://www.autoadmit.com/thread.php?thread_id=5758254&forum_id=2Reputation#49156487)