JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

JavaScript

var data = {
"1":["Вася", "Васин"],
"2":["Петя", "Петров"],
"3":["Саша", "Сашов"],
"4":["Миша", "Мишов"],
"5":["Антон", "Антонов"]
}
var out = "";
for (var key in data) {
  out += "№ " + key + ": " + data[key][0] + data[key][1] + "<br>";
}
document.querySelector("div").innerHTML = out;