For many years, Harriet Stevens knew very little about how previous generations of her family fled Vienna to escape the Nazis — or about the man who made it possible.

It was only when Ms Stevens and her sisters decided to interview their grandfather, Siegfried Schrotter, in the 1990s that the story emerged of how a Leeds businessman came to the family’s rescue.

It will now feature as part of an exhibition at Leeds City Museum, exploring the heritage of those who came to the area from across the globe.

Ms Stevens said that her father, Eric, was just six when her grandfather, a hemp company representative, fled to Switzerland to try to negotiate safe passage to England for his wife Hedwig and their young son.

Her father and grandmother lived in a Jewish commune in Albania for six months, eventually being joined by her grandfather.

They were able to come to Leeds thanks to the sponsorship of family friend Philip Boyle, a partner in the Boyle and Son hemp company.

Ms Stevens and her sisters are now searching for the living relatives of Mr Boyle to express gratitude for saving her family.

“We knew nothing of the story until we started listening to the recordings and doing our own research,” said the Bristol-based 60-year-old.

“My grandfather fled Vienna after Kristallnacht in November 1938, when he saw the rounding up of Jews and was forced to hide in a wardrobe while the family home was being ransacked.

“He was a very quiet and reserved man for the rest of his days and his traumatic experiences definitely left a mark on him.

“Researching the story has given me so much respect for my grandfather and for what he had to go through to keep his family safe and get them out.”

She wants to meet any surviving relatives of Mr Boyle “because if it were not for him, we might not be here”.

Ms Stevens, who has undertaken her research alongside sisters Rachel Stevens and Jessica Russell, added: “All but one of my grandmother’s five siblings were murdered in the Holocaust and my sisters and I would love to find any living relatives of Philip Boyle to thank him through them for saving my family’s lives.”

The story of the Schrotters is one of a number being collated by the Leeds museum.

Councillor Judith Blake, leader of Leeds City Council, said: “The foundations of Leeds were built by the thousands of people who came here determined to forge a new life for themselves and their families.

“Their influence has permeated so many aspects of our local history and heritage and it’s always a poignant experience to find out more about their stories and to learn how immigrants helped shape the city we live in today.”

She is hoping more people like Ms Stevens and her sisters will come forward to tell their family stories through the exhibition.

The museum would like to hear the migration stories of others who came to Leeds — or from anyone who has information about the Schrotter family, or Philip Boyle from Boyle and Son hemp and flax factory. The email address is museum@leeds.gov.uk