Alla is a derivative (Spanish) of Alexandra.
Alla is also a derivative of Alice.
Alla is also a derivative (English and Russian) of the English, Scandinavian, and Italian Ella.
Alla is uncommon as a baby girl name. At the height of its usage in 1901, 0.005% of baby girls were named Alla. It was #919 in rank then. The baby name has seen a decline in frequency since then, and is currently used only on a very modest scale. In 2015, within the family of girl names directly related to Alla, Ella was the most popular.
† Pronunciation for Alla: AA as in "odd (AA.D)" ; L as in "lay (L.EY)"