I apologise of doing this in completely random and arbitary fashion, but here some warships, namely those whom we started with in 1918, and didn't made it to the WWII,
The C-class, or Cyclone (Tsiklon) class or the No:214 class small Torpedoboats. Their service was short, since allready 1919, when the the Finnish navy was giving cover for the RN that fougth the Soviet-Russian fleet in baltic, based at Finland, these little ships were pressured by Admiral Cowan to stay as long as the RN big ships did, and by November, the ice was too much and despite attempts to escort them to docks by Icebreaker Ilmarinen, they didn't make it and 3 of the class of 4 sunk by crushed with ice. The fourth which was under repairs, didn't sail any longer after this.
The S-class, or Sokol class, consisted 5 vessels from the various sub-groups of the Russian Sokol class. Of these, 2 were later returned to the Soviets in 1922 by the Tarto treaty, and S-2 sunk in storm outside Pori in 1925, marking our biggest peace time naval disaster and raised attention to the poor material condition of the old inherited Tsarist ships.
Another torpedoboat, the No:212 was also briefly in Finnish service as S-6, but she was returned also in 1922. I will return to it, once I find proper sources of its quise in Finnish service.
Klas Horn and Matti Kurki were former torpedo-gunboats Posadnik and Vojevoda, which acording to Finnish tradition were originally suposed to be ordered by Montenegro from Elbing yards, but Russian sources always states them to be ordered by themselves from the start. In Finnish service they served as gunboats and served untill Mid-1930s when Matti Kurki was expended as a target and Klas Horn became depot hulk for the survey department of the civilian maritime administration. In this role she was retained until 1957, then converted into a floating restaurant and burnt in 1963 after she was scrapped.