Ida Loo-Talvari (née Ida Loo; 19 June 1901, in Narva, Estonian Governorate, Russian Empire – 29 June 1997, in Stenungsund, near Göteborg, Sweden) was an Estonian opera singer.
She was the wife of composer Evald Aav (first marriage) and the sister of the librettist Voldemar Loo.
She was the second child of Juhan Loo and Helene Rosalie Katlasepp.
Her elder brother was a famous librettist Voldemar Loo.
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