Time transposition

What if Julius Caesar, Albert Einstein, or Freddie Mercury had never existed in their time and had instead lived in our era or in the distant past? You are an ordinary person living in an ordinary world, but you are completely unaware that, in another world where you were born in a different time, you would have become someone highly influential in history or culture. You bear their name, you resemble them, you share their talents, passions, and personality, but despite all this, your life is undoubtedly very different from that person's in that other world.