What is "hauhonselka"

Hauhonselkä is a lake in Finland. It is part of a chain of lakes that begins from the lakes Lummene and Vesijako at the drainage divide between the Kokemäenjoki and Kymijoki basins and flows westwards from there through the lakes Kuohijärvi, Kukkia, Iso-Roine, Hauhonselkä and Ilmoilanselkä and ends into lake Mallasvesi. The lake is located in the city of Hämeenlinna in the area of the former municipality of Hauho in the Tavastia Proper region and it is a part of the Kokemäenjoki basin.