Reigilaid (, also spelled Reigi laid, also known as Reigi saar 'Reigi Island' or Reigi poolsaar 'Reigi Peninsula') is a former small islet in the Baltic Sea in Orjaku, Estonia.
Reigilaid lies at the northwest end of Kassari island, in Jausa Bay. It is now a peninsula of the island of Hiiumaa. Reigilaid has an area of to , depending on the measurement, and it has an oblong northwestâÂÂsoutheast orientation. It lies above sea level.
The name Reigilaid is a compound, in which the second element, -laid, means 'islet'. Among various theories, the most common is that the first part, Reigi-, derives from a form like *hraukia, *röiki, or *räike, meaning 'stony land, stony region', thus 'stony/rocky island'. The onomastician Aino Naert (1921âÂÂ2008) pointed out that in the Hiiumaa Swedish dialect öy became i, and that the final -i in Reigi- may be a development of Swedish ö 'island' (from Old Norse ey).