Treyvaux (; ) is a municipality and a village in the district of Sarine in the canton of Fribourg in Switzerland. History Treyvaux is first mentioned around 1163-66 as Tribus Vallibus ("Of Three Valleys"). Over the time it was known under numerous variations of the Latin name: Tresvaux, Trevaux, Tresvals, Trevauz, Trevoul, Treyvaul, Treyvas, Trevas, Trefels. Geography Treyvaux has an area, , of . Of this area, or 63.4% is used for agricultural purposes, while or 29.5% is forested. Of the rest of the land, or 6.2% is settled (buildings or roads), or 0.6% is either rivers or lakes and or 0.1% is unproductive land. Of the built up area, housing and buildings made up 3.4% and transportation infrastructure made up 1.9%. Out of the forested land, all of the forested land area is covered with heavy forests. Of the agricultural land, 21.7% is used for growing crops and 40.5% is pastures. All the water in the municipality is flowing water. The municipality is located in the Sarine district, on the right bank of the Sarine. Coat of arms The blazon of the municipal coat of arms is Per bend sinister Or a Rooster's Head Sable crested unguled beaked and langued Gules and Gules. Demographics Treyvaux has a population () of . , 8.0% of the population are resident foreign nationals. Over the last 10 years (2000–2010) the population has changed at a rate of 10.5%. Migration accounted for 5.7%, while births and deaths accounted for 5%. Most of the population () speaks French (1,165 or 93.3%) as their first language, German is the second most common (41 or 3.3%) and Portuguese is the third (23 or 1.8%). There are 6 people who speak Italian and 1 person who speaks Romansh. , the population was 49.9% male and 50.1% female. The population was made up of 637 Swiss men (45.5% of the population) and 62 (4.4%) non-Swiss men. There were 640 Swiss women (45.7%) and 62 (4.4%) non-Swiss women. Of the population in the municipality, 612 or about 49.0% were born in Treyvaux and lived there in 2000. There were 439 or 35.2% who were born in the same canton, while 101 or 8.1% were born somewhere else in Switzerland, and 88 or 7.1% were born outside of Switzerland. , children and teenagers (0–19 years old) make up 30.1% of the population, while adults (20–64 years old) make up 56.9%