Edwin Jarvis, loyal friend and butler of the Stark family and later, the Avengers, first appeared in Tales From Suspense #59.
My favorite issue featuring Jarvis is Avengers #201. He is featured in the back up story of this issue. Definitely worth checking out.
Jarvis has recently been featured as the mentor to the new Unstoppable Wasp, Nadia Pym. Nadia was revealed to be the daughter of Hank Pym and his first wife.
Enjoy your Sunday evening and have a great week!