Final answer:
Lamech is the first individual mentioned in Scripture associated with bigamy, as noted in Genesis 4:19 where he is described as having two wives. Bigamy as it is defined legally today, however, was not a concept during biblical times, where the practice of a man having multiple wives was culturally accepted.
Step-by-step explanation:
The first individual mentioned in Scripture who might be associated with what we understand as bigamy is Lamech. Lamech is briefly mentioned in Genesis 4:19, which states, "Lamech married two women" (this is not the same Lamech as Noah's father). Bigamy is the act of entering into a marriage while still being legally married to another person. In biblical times, however, the term 'bigamy' was not used, and the practice of a man having more than one wife (polygamy) was culturally accepted in many societies. Therefore, while Lamech would be considered the first to engage in polygamy according to Scripture, bigamy as understood today, in terms of the law, was not an issue at that time. In contrast to polygamy, which has historical cultural acceptance, bigamy is generally considered a felony and is illegal in most modern states.