Tregurtha rhymes with:
bertha, eartha, hertha, murtha, agatha, aletha, anantha, aretha, atha, bartha, bertha, bolitho, botha, calantha, cleantha, cliantha, diantha, eartha, hertha, hiawatha, hyacintha, iantha, inkatha, jacintha, juditha, katha, letha, martha, mccartha, mintha, murtha, naphtha, philantha, ramtha, samantha, tabitha