What is the relevance of mention of women in Jesus' Genealogy?

We have in Matthew 1 the Genealogy of Jesus. Though Israel followed a patriarchal lineage, the names of five women find a place in the Genealogy. They are: Tamar, Rahab, Ruth, Bathsheba, and Mary. Of course, Mary, being the Blessed Virgin Mother of Jesus, is an indispensable figure in the Genealogy. But, what is the relevance of the mentions of the other four women? Is the significance the result of a common attribute, or is it specific to each?