Strongilah was the daughter of the Karaite Jew Eliyah Gibor from Crimea.
As a kira, she acted as a go-between and provided luxury items, medicine and letters.
She was possibly the same kira who cured an eye illness of an unidentified sultan's mother and was greatly awarded for this.
She may have been the same unidentified kira who is noted to have performed secretarial tasks for Hürrem Sultan's charity programs and has been mentioned in connection to Mihrimah Sultan, although Esther Handali could also have been this kira.
[citation needed] Strongilah converted to Islam under the name Fatma shortly before her death.