[note 1][1]: 276–277  The family later served the archbishop of Veliky Novgorod, and subsequently integrated into the Ryazanian nobility.

[2][3] Their ancestors ruled in the Principality of Galich (an appanage of the Vladimir-Suzdal Duchy), until Duke Dmitry Donskoy, Grand Duke (Prince) of Moscow annexed their domain in 1362 and exiled Prince Dmitry Ivanovich of Galich, who fled to Veliky Novgorod where he entered the service to the local archbishop.

Around this time Lyapunov family has lost their Duke title (the exact date is unknown though) and were considered boyars of the Novgorodian archbishop.

Lyapunov's family ascends to a boyarin (servant) of Pimen "Black" [ru] (1571, an Archbishop of Novgorod and supporter of Ivan IV) named Ivan Borisovich Lyapun' Osypin (Russian: Иван Борисович Ляпунь Осипин), from which Lypunov (Russian: Ляпунов) family name has started.

[2][3] The grandson of Semyon Osina, Lyapun Osinin, is considered the founder of the Lyapunov family.