Preheat oven to 325°F. Grease and flour 10‑inch Bundt.
Simmer peaches with brown sugar, ½ cup sugar, cinnamon & vanilla 5 minutes; cool.
Cream butter & 3 cups sugar 5 minutes. Beat in cream cheese.
Add eggs one at a time. Mix in vanilla & Hennessy.
Whisk flour, baking powder, salt. Add to butter mixture in three additions.
Spread half batter in pan. Spoon peach mixture over; top with remaining batter. Swirl.
Bake 1 hour 40–50 min until tester is nearly clean.
Cool 15 min; invert onto rack to cool completely.