He was named after his mother 's father , who died during the Holocaust .
He is one of seven children born in his father 's second marriage to Chaya Nechama Ungar , daughter of the Nitra Rav , Rabbi Shmuel Dovid Ungar .
Shmuel Dovid Ungar was named after his mother 's father , who died during the Holocaust .
He is one of seven children born in his father 's second marriage to Chaya Nechama Ungar , daughter of the Nitra Rav , Rabbi Shmuel Dovid Ungar .