Array with objects that have duplicate prop values

const people = [
  { name: 'Alice', age: 21 },
  { name: 'Max', age: 20 },
  { name: 'Jane', age: 20 },
  { name: 'Jesse', age: 22 },
  { name: 'Mike', age: 24 },
  { name: 'Jen', age: 21 },
  { name: 'Jesse', age: 22 },
  { name: 'Jen', age: 21 },
  { name: 'Mike', age: 25 },
  { name: 'Mike', age: 21 },
  { name: 'Alice', age: 21 },
  { name: 'Max', age: 21 },
  { name: 'Jane', age: 20 },
  { name: 'Jesse', age: 23 },
  { name: 'Mike', age: 26 },
  { name: 'Jen', age: 21 },
  { name: 'Jesse', age: 27 },
  { name: 'Jen', age: 30 },
  { name: 'Mike', age: 25 },
  { name: 'Mike', age: 21 }
];