Meaning of the Sanskrit Word: yudhisthirat

  yudhiṣṭhirāt—from Mahārāja Yudhiṣṭhira    SB 9.22.29
  yudhiṣṭhirāt—from Yudhiṣṭhira    SB 9.22.30-31

Can't find any compound Sanskrit words containing yudhisthirat.