To remove duplicate form an array with JavaScript, we can create a set.

For instance, we write

const array = [
  { id: 123, value: "value1", name: "Name1" },
  { id: 124, value: "value2", name: "Name1" },
  { id: 125, value: "value3", name: "Name2" },
  { id: 126, value: "value4", name: "Name2" },
];
const names = [...new Set(array.map((a) => a.name))];

console.log(names);

to call map to return an array of name property values from the objects in array.

Then we convert it to a set with the Set constructor.

Then we use the spread operator to convert the set into an array.