Umlocā (Umlocha) is a distinguished Apsarā (Apsara; Celestial courtesan). She performed a dance during the birth ceremony of Arjuna.

Mahābhārata (Kinjawadekar)(1.123.65)
Mahābhārata Vols. 1-43 (Siddhāntabāgīśa)(1.117.69)