Superman's Earth surname.
The first hint to crack the puzzle «Superman's Earth surname.» is:
It is a word which contains 4 letters
The second hint to crack the puzzle «Superman's Earth surname.» is:
It starts with letter K
K
The third hint to crack the puzzle «Superman's Earth surname.» is:
It ends with letter T
K
t
Looking for extra hints for the puzzle «Superman's Earth surname.»:
Click on any empty tile to reveal a letter
K
t
The answer for the puzzle «Superman's Earth surname.» is:
K
e
n
t