What number does Aunt Eva have on her arm? Whose number is this and who is Aunt Eva?

When Aunt Eva pushes back her sleeve, Hannah notices the number J18202. When Eva asks her why she is staring at it, she offers to explain it to her, but Hannah says, no, that she knows what it means. She, then, begins to recite the meaning of each letter and number. She also tells her aunt that the commando was her brother – her own Grandpa Will –and Aunt Eva whispers back that his name was Wolfe, but ironically, he was as gentle as a lamb. Then, Aunt Eva admits that she was Rivka. To that, Hannah answers, “Oh, I remember. I remember.” The lesson her mother had tried to teach her that day has finally been learned.

J18202