Tristan’s mother in the Icelandic Saga af Tristram ok Ísoud. She replaces Blancheflur (Blancheflor) from the earlier German sources and is the counterpart of Blesinbil in Norse Tristan legend.
The daughter of King Philippus and Queen Philippia (Philippía) of England, she revolted against her brother, Mórodd (Mark), when her parents died. The short rebellion ended in a truce.
Her lover, Plegrus, was killed jousting with the Spanish knight Kalegras, with whom she fell in love. They had a son, Trostan, and she died soon after her lover.
Source
Saga af Tristram ok Isodd | 14th century