Rona de Sus (Hungarian: Felsőróna; German: Oberrohnen; Ukrainian: Bишня Рівня) is a commune in Maramureş County, Romania. It is composed of two villages: Coştiui (Rónaszék; Rohnen; Коштіль) and Rona de Sus.The first documentary attestation is 14 mai 1360 in a document emitted by king Louis the Great of Hungary.

At the 2002 census, 86.5% of inhabitants were Ukrainians, 9% Hungarians and 4.4% Romanians. 72.9% were Ukrainian Orthodox, 10.8% stated they belonged to another religion, 8.6% were Roman Catholic and 4.8% Greek-Catholic.

Coordinates: 47°54′N 24°03′E / 47.9°N 24.05°E / 47.9; 24.05

Song In (in hangul 송인, in hanja 宋仁) was a civil official in the mid-Goryeo era who became the intermediary founder of the Jincheon Song clan. His highest post was munha pyeongjangsa (문하 평장사). This was the highest government position in the period. Song In was responsible for administration, judicial affairs and economy in the district.

As he performed meritorious deeds during the King, he was conferred with Chanhwagongsin and Jincheonbaek. Baek was a position of politicians who were responsible for administration, judicial affairs and economy in the district. As the government created him Jincheonbaek, his family started regarding Jincheon as their origin. Hence, the family origin became Jincheon Song.

When he was in the position of Sangsanbaek, he tried to be just and fair in all the administrative affairs and strived to enhance the welfare of his people. He also focused on education for the youth and courtesy for people, which made his district famous for most excellent behaviors in the nation. After that, the people have long paid tribute to his feats.