In Luke 3:19
But Herod the tetrarch, being reproved by him for Herodias his brother Philip's wife, and for all the evils which Herod had done
And in Matthew 2:1
Now when Jesus was born in Bethlehem of Judaea in the days of Herod the king, behold, there came wise men from the east to Jerusalem
Assuming they are different, what are their significant differences? Were they both kings?