riiuliku
Riiuliku is a surname of Estonian origin. It is derived from the Estonian word "riiul," which translates to "shelf" in English. This suggests that the surname may have originated as an occupational name for someone who made or sold shelves, or perhaps as a nickname related to a characteristic associated with shelves. Like many surnames, its exact origins are not definitively known and can be difficult to trace without detailed genealogical research. Estonian surnames, particularly those that are not patronymic or toponymic, often have connections to everyday objects, professions, or natural elements. The surname Riiuliku is not particularly common, but it can be found among individuals of Estonian descent. Further research into historical records and family trees would be necessary to understand the specific lineage and development of this surname.