In fact, the surnames Ilic and Vissarionovich in the names of Vladimir Ilic Lenin and Joseph Vissarionovich Stalin are not surnames, but patronymics—names that indicate the father’s name, a typical Russian tradition.

In Russian, patronymics are formed from the father’s name + suffix:

• “-ovich” (for men)
• “-ovna” (for women)

Examples:

1. Vladimir Ilic Lenin – “Ilic” means “son of Ilya” (Lenin’s father was Ilya Ulyanov).
   
2. Joseph Vissarionovich Stalin – “Vissarionovich” means “son of Vissarion” (Stalin’s father was Vissarion Dzhugashvili).

This is different from South Slavic surnames with “-iq/-i?”, which are inherited and not direct patronymics. So, “-ovic” and iq is Russian

The surname Čarnović is a Russian-influenced form of the name Černojević , which is originally Serbian/Montenegrin and is used for the famous dynasty that ruled Zeta (Montenegro) in the 15th-16th centuries. The interesting question is why the Russian form is sometimes encountered and not the South Slavic one.

Reasons for using the form “Čarnović” instead of “Černojević” (Đuraj – Albanian tribe)

1. Influence of the Russian language and historical relations

• Montenegro had close relations with Russia, especially after the 18th century, when Russia helped Montenegro against the Ottoman Empire.
• Many Montenegrin and Serbian names were adapted to the Russian form in diplomatic and historical documents.
• Russian tends to change some sounds to fit its phonetics (e.g. from “Crnojevi?” to “?arnovi?”).

1. Phonetic differences between Serbian/Montenegrin and Russian

• In Serbian/Montenegrin, “Crno” means “black” and is a common term in family names.
• In Russian, (Černyj) has the same meaning, but phonetic adaptation caused some forms of the name to change.

1. Use of adapted names in literature and historiography

If the name “Čarnović” is used in any historical text or source, this may be due to the influence of Russian historians or attempts to Russify some names.

Russian priests have had an influence in Montenegro mainly since the 18th century, when the Russian Empire began to politically and financially support the Principality of Montenegro.

The Main Period of the Arrival of Russian Priests in Montenegro

1. 18th Century – During the reign of Peter the Great and Catherine the Great, Russia began to assist Montenegro against the Ottoman Empire. During this period, several Russian priests went to Montenegro to strengthen religious and political ties between the Russian and Montenegrin Orthodox Churches.
   
2. 19th Century – During the reign of Prince Nicholas I (1878–1918), Montenegro had very close relations with Russia, and Russian priests helped in the opening of religious schools and the development of the Montenegrin Orthodox Church.

Reference

https://www.zemrashqiptare.net/news/67644/fahri-xharra-kur-linden-prapashtesat-ic-ne-malin-e-zi.html?skeyword=fahri%20xharra