Free energy in biology is named Gibbs free energy after:

1. Free energy is the energy available to do work once entropy is accounted for. 2. The measurement carries its inventor's name. 3. Free energy is called Gibbs free energy, abbreviated with the letter G, after Josiah Willard Gibbs. 4. Krebs, Maxwell and Lavoisier are associated with other discoveries entirely. _Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 6 'Metabolism', sections 6.1-6.5_