The name Suitov refers to a line of nobility based in Applestone. The name is pronounced "swee-toff" in its Anglicised form. The original pronunciation is closer to "svee-tofe".
The most well-known of the Suitovs is Suitov Iceheart. Other notable Suitovs have included Suitov Sangfroid and the father of Suitov Iceheart, whose nickname is as yet unknown.
The origin of the Suitov line lies with a then-unknown northerner who arrived from the boreal wastes and promptly performed a service (likely martial) for the monarch of the time, resulting in the reward of land and hereditary title. The name Suitov was self-chosen and roughly means Winter. Indeed, non-inheriting cions have sometimes taken the surname Winter.
The ending is not a Russian-style -ov, meaning "son of"; the language bears no relation to Russian barring a few superficial similarities (or its author would be surprised to learn otherwise, knowing no Russian).
(An incomplete list which will be fleshed out eventually.)