When I was a child, my parents would bless my siblings and me on Erev Shabbos. The formulation that they used was "Yesimcha Elokim kEphraim v'ch'Menashe" for each son and "Yesimech Elokim kSarah, ...
I know why we use Ephraim and Menashe when blessing the children on Friday nights, (see: Why Does Hashem Bless Us Like Efraim And Menashe?) but why do we use Birkat Kohanim? Is there any specific ...