Our Sages tell us that the name of an individual reflects his character and essence. It is what connects him to his spiritual soul, serving as the conduit to his spiritual sustenance and nourishment. Therefore, the giving of a name is a serious undertaking and involves a great responsibility. The Kabbalist Rabbi Yitzchak Luria (known as the Ari HaKadosh) writes, “When a person is born and his father and mother give him his name…the Holy One puts into their mouth the particular name required for that soul.”
Naming After Someone - Some people name their child after a relative, such as a grandparent or great-grandparent, to perpetuate the deceased person’s memory. Some choose to name their child after a great Jewish leader or a Biblical figure. Still others choose a Hebrew name simply for its meaning, for example “Chaim” which means “life” or “Simcha” which means “happiness.”
Customs vary concerning naming a child after a relative who is still living. Sephardim (Jews of Spanish or Middle Eastern decent) readily name their children after living relatives, whereas Ashkenazim (Jews of Polish, Russian, or German decent) name their children only after someone who has passed away. In all cases we do not announce the name of the child until after the Bris ceremony for a boy, or naming ceremony for a girl.