Looking for Emil Gross family & anchestors

I'm Monica from Indonesia.

I'm looking for information about my family's anchestor from my Grandfather : EMIL GROSS.

My Grandfather EMIL GROSS was born in Prague on February 10th 1903.He passed away on 1955 (My mom said he was a Jewish)

My Grandmother VERA was born in Hradec Kralove on June 23rd 1918. She passed away on 1986

They got married in Prague on February 1946,and got an only daughter VERA GROSSOVA (my mother) was born in Prague on January 6th 1952.

They used to lived at Perlova Ulicka - Praha

My Mother than married an Indonesian man named OEMARDI on 1972,and they got 2 children : Monica Oemardi (me) & Alberto Oemardi.

If we are somehow related, please let me know..

Sincerelly,

Monica Oemardi