Final answer:
The first governor of Oklahoma after Lee Cruce was Robert L. Williams, who served from 1915 to 1919 and was known for his contributions to the state's infrastructure and governmental reforms.
Step-by-step explanation:
The first governor of Oklahoma after Lee Cruce was Robert L. Williams, who served as the third governor of Oklahoma from 1915 to 1919. Following the tenure of the second governor, Lee Cruce, Williams took office and played a significant role in the early development of the state's government and legal system. He was particularly noted for his commitment to improving the highway system in Oklahoma, and his efforts in state finance and education reform.