To make the vanilla syrup. In a medium pot, combine 1/2 cup water, the honey, and cinnamon. Bring to a boil over high heat. Boil 3-5 minutes, then remove from the heat. Stir in the vanilla extract. Let cool. Keep in the fridge for up to 2 weeks.To make the Russian. Fill a glass with ice. Add the vodka, coconut rum, Kahlua, and vanilla syrup. Stir gently. Add the heavy cream and stir to combine. Garnish with cinnamon, if desired.