Delightful as always, Will. I enjoy your playing every time.

Re: Anniversary Song aka Oh How we Danced..., according to Wiki, E European [Romanian, tho written acc another entry on Ivanovici by a Serb] but not shown as specifically Jewish.
~~ not by Berlin or Gershwin: attrib in an online lyrics entry to PLEYER, FRANK / IVANOVICI, J.

The following wikipedia entry applies ~~

'"Waves of the Danube" (Romanian: Valurile Dunării; Serbian: Дунавски валови/Dunavski valovi ;German: Donauwellen; French: Flots du Danube; Russian: Дунайские Волны)[1] is a waltz composed by Iosif Ivanovici (1845–1902) in 1880, and is one of the most famous Romanian tunes in the world. In the United States, it is frequently referred to as "The Anniversary Song",[2] a title given by Al Jolson when he and Saul Chaplin released an adaptation of the song in 1946. ....
Under the name of "The Anniversary Song" it was featured in Al Jolson's biographical Columbia film The Jolson Story in 1946 and the sequel Jolson Sings Again (1949).'

HTH ~ & thanks again.

~Michael~