What Do These Two Symbols Have in Common?
I'll let you do the homework.
See here at the 12:51 mark
and Responsa of Rabbi Meir of Rothenburg (Prague 1608), nos. 65, 532.
לְמַעַן יֵדְעוּ דּוֹר אַחֲרוֹן בָּנִים יִוָּלֵדוּ יָקֻמו וִיסַפְּרוּ לִבְנֵיהֶם -תהילים עח That the generation to come might know them, even the children that should be born; who should arise and tell them to their children- Pslams 78