The Irish symbol which brings good luck for those who find the four leaf clover. Sometimes the dream could indicate the Ireland or Irish people.

…The dream, in which you see the three-leaf cover, indicates three different times: past, present and future. The dream shows how you are coping with your life and what it will bring you in the future. The dream, in which you see the fourleaf clover, represents good fortune. Perhaps the dream indicates the situation you made to become favorable to you….

It is considered a symbol of the Trinity and therefore is always a beneficial symbol. If it is a fourleaf clover, then it symbolizes a good luck.