Her parents were Mary Ann Frances (born Sprake) and Frederick Charles Hengler.

Her great grandmother was Sarah Hengler, known professionally as Madame Hengler, a leading fireworks pyrotechnist at Vauxhall and Ranelagh Pleasure Gardens, Astley’s Circus and many high profile outdoor public entertainments.

She was renowned for the quality of her riding which was regarded as a touchstone when judging how others rode.

He rode and performed at Hengler's Circus under the name "Alexander Oscar".

Jenny Hengler features in a number of the information boards inside.