Loppilainen means the people of Loppi (a city in Finland).
Loppi is a municipality in Finland. It is located in the province of Southern Finland and is part of the Tavastia Proper region, located about 50 kilometers (about 30 miles) south of the city of Hämeenlinna. Loppi was founded in 1632. The municipality has a population of 7,848 (31 March 2021) and covers an area of 655.97 square kilometres (253.27 sq mi) of which 58.36 km2 (22.53 sq mi) is water. The population density is 13.13 inhabitants per square kilometre (34.0/sq mi). The municipality is unilingually Finnish.
Neighbour municipalities are Hyvinkää, Hämeenlinna, Janakkala, Karkkila, Riihimäki, Tammela and Vihti. The most significant main road connection to get from Loppi to Riihimäki is the national road 54, which runs between Tammela and Hollola, and which is connected to the Highway 3 (E12) between Helsinki and Tampere. Another significant road connection in the direction of Helsinki is the regional road 132 passing through the municipality of Nurmijärvi. – according to wikipedia