Final answer:
The genus name of the earliest bipedal hominin is Ardipithecus, which includes species such as A. ramidus and A. kadabba, dating back to 4.4 and 5.6 million years ago respectively.
Step-by-step explanation:
The genus name of the earliest bipedal hominin found is Ardipithecus. This genus is significant because it includes some of the oldest known bipedal hominins, such as Ardipithecus ramidus and Ardipithecus kadabba. Ardipithecus ramidus, the younger species, dates to about 4.4 million years ago (MYA), while specimens of Ardipithecus kadabba are older, dating back to approximately 5.6 MYA. Although the precise role of Ardipithecus in human evolution is debated, the discovery of multiple specimens of this genus has demonstrated their capability for bipedal locomotion.