Margaret Tisdall (8 January 1906 – 30 April 1979), better known by her stage name Peggy Dell, was an Irish singer and pianist who became a popular music hall entertainer.

While still in her teens Tisdall formed her own band which played at various Dublin venues, such as the Theatre Royal and the Capitol Theatre. In the early 1930s she joined Roy Fox's band in London as his first female singer. For visual appeal on posters and handbills, Peggy Tisdall then adopted the stage name ‘Peggy Dell’ and kept it throughout her subsequent career. A deep voice added to the jazz-band quality of her performance.
She toured the USA to great acclaim with the Jack Hylton Orchestra, returning to Dublin on the eve of the second world war. She turned down a BBC offer of a place in Tommy Handley's new ITMA (‘It's That Man Again’) radio show of 1939–49, a series later enshrined in the canon of British entertainment.
Nevertheless, in the comparative safety of ‘Emergency’ Dublin, Peggy Dell joined Phil Murtagh's band at the Metropole ballroom on O'Connell St., close to the Capitol. She continued to appear at the Theatre Royal .Her fame was undiminished and ‘the Peggy Dell Orchestra’ achieved national prominence.. She played and sang at dances, performed in revues, and acted in pantomimes.
Nevertheless, in the comparative safety of ‘Emergency’ Dublin, Peggy Dell joined Phil Murtagh's band at the Metropole ballroom on O'Connell St., close to the Capitol. She continued to appear at the Theatre Royal .Her fame was undiminished and ‘the Peggy Dell Orchestra’ achieved national prominence.. She played and sang at dances, performed in revues, and acted in pantomimes.

She suffered serious head injuries in a taxi accident in 1970, causing recurrent fainting spells, virtually ending her career and her remaining public profile. Some thought she had died, so private did she become. By a twist of fate, her career was suddenly resurrected on 22 December 1973 by her guest appearance on a special RTÉ ‘Late late show’ television birthday tribute to Noel Purcell. Surprised audiences were struck by Peggy Dell's physical presence and virtuosity at the piano, leading to many inquiries and expressions of delight at her part in the show.
RTÉ subsequently provided her with a television series, ‘Peg o' my heart’, from which commercial albums were made. Other numbers were revived from her previous recordings. In 1974 her television series won a Jacob's award and she was engaged to entertain Mediterranean cruises until 1975, highlights of a second career which happened by chance.
In February 1975, she won a Jacob's Award for the programme. From then until her death, Dell enjoyed renewed success as an entertainer, performing regularly on radio and television, as well as making live appearances. In 1975 she released an album entitled Among My Souvenirs.
Peggy Dell never married. She died in Dublin aged 73 and is buried in Glasnevin Cemetery.
(Edited from Wikipedia & Dictionary of Irish Biography)