My late father Josef LOEFFLER/ LOFFLER was born in Budapest in 1920. He had an older brother who died in a young age before my father was born, probably during the 1918-19 influenza pandemic. I am asking fellow researchers for suggestions how to find any details about this brother . What can help is: Their parents were married in June 1910, 2 more siblings were born in May 1911 and Aug 1914; It narrows the optional DOB to 1912-3 or 1915-7; Their last known address in Budapest in about 1920 was in BUDAPEST IV, SZONDY utca.
