Help required to translate the back of a photo #yiddish #translation


I am looking for help to translate writing on the back of the photo in attempt to identify family members. 

Thank you.
Esther Gertopsky
Silver Spring, MD

Yitschok Margareten

For everlasting memory to my nephew and family I'm sending this photo from Avraham Baruch Derg (or Tzerg) 
Yitschok Margareten


Because the post card is sent to B.Derman, in Bucharest Romania, from a Spanish speaking country. I think the sender's family name is also Derman. Just a suggestion.

Angel Kosfiszer

Richardson, Texas