The name Yaba is a girl's name of African, Ghanan origin meaning "Born on a Thursday". Yaba and is often added to lists like Day Names and discussed in our forums with posts like "Bohemian Babies AB, BC, CD, DE".
From the experts:
The Akan people of Ghana and the Ivory Coast frequently name their children after the day of the week they were born and the order in which they were born. Most Ghanans have a name using this system (think Kofi Annan, whose name means born on a Friday). Yaba is the female name for babies born on a Thursday (the male variant is Yaw).