Have a nice month, everyone!
Except for eponymus hernias (Littre --> Meckel's diverticulum; Amyand aka appendicocele --> appendix), it is rational to suppose that the content of an inguinal hernia is a segment of the lower part of the small intestine.
Ileum is the most probable candidate, because it lies low within the abdominal cavity and is not immobilized by peritoneum. Jejunum lies higher and, although it cannot be discarded as a potential content, I believe that the ileum is still more possible.