on 31 August 2006, and Arzier became part of the new district of Nyon. The official name of the municipality was "Arzier", and has been officially changed to "Arzier-Le Muids" in September 2013. The name is a mix of two villages, Arzier and Le Muids and the hamlet of Montant and La Chèvrerie. Le Muids (altitude : ) is a small village which, due to its small size and proximity to Arzier (altitude : about ) is part of the same municipality as its larger neighbor. Arzier natives are called "Brennards" because the village experienced a severe fire in its early days (derivative of French for burn "bruler"). Residents of Le Muids are called "Rafi." Coat of arms The blazon of the municipal coat of arms is Per pale Gules and Azure, overall a branch Vert with three leaves and two roses Argent, from dexter and sinister a cloud of the last from each issuing hand of the same clothed Or shaking the other one. Demographics Arzier has a population () of . , 25.6% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 24.4%. It has changed at a rate of 18% due to migration and at a rate of 6.5% due to births and deaths. Most of the population () speaks French (1,421 or 78.5%), with German being second most common (144 or 8.0%) and English being third (124 or 6.8%). There are 23 people who speak Italian and 1 person who speaks Romansh. The age distribution, , in Arzier is; 261 children or 12.0% of the population are between 0 and 9 years old and 371 teenagers or 17.0% are between 10 and 19. Of the adult population, 169 people or 7.8% of the population are between 20 and 29 years old. 259 people or 11.9% are between 30 and 39, 406 people or 18.6% are between 40 and 49, and 327 people or 15.0% are between 50 and 59. The senior population distribution is 237 people or 10.9% of the population are between 60 and 69 years old, 83 people or 3.8% are between 70 and 79, there are 49 people or 2.2% who are between 80 and 89, and there are 16 people or 0.7% who are 90 and older. , there were 758 people who were single and never married in