Jeffrey Spector, the advertising executive who killed himself by assisted suicide at a clinic in Switzerland, was a member of St Annes Hebrew Congregation in Lancashire.
Synagogue member June Kendall said the Spector family were members of the Orthodox shul.
Mr Spector, who was 54, took a lethal dose of poison at Dignitas clinic in Zurich.
He had decided to take his life because he had an inoperable tumour on his spinal cord which could have left him paralysed from the neck down.
