Double barrel names can be made up of any two names, and their meanings can be taken as a combination of the meanings of the two root names. Mai is a variation of May. Lilly-May is a popular combination for girls in Britain. Lily is derived from the name of the flower, and is the Christian symbol for purity. May can be a pet form of Mabel, or can be associated with the month. A double barrel name like this could be given if the name of a relative is wanted to be passed down, but variation is desired. Lily-Mai would also be a suitable name for a little girl born in May, where it is preferable that the name should not be as commonly found.