Joanna was the wife of Chuza, a steward of Herod Antipas, the tetrarch of Galilee (his father, Herod The Great, attempted to have the Christ killed as an infant, while Herod Antipas saw the deaths of both Jesus Christ and John the Baptist - see John's Last Days and The Herods). Joanna was among the many women who were disciples of Christ; she was one of those who discovered the empty tomb on the morning after Christ's resurrection.
"Mary Magdalene, and Joanna, and Mary the mother of James"
Joanna was apparently one of those many men and women who had been miraculously healed of various "evil spirits and infirmities" and thereafter became Believers:
"And it came to pass afterward, that He went throughout every city and village, preaching and showing the glad tidings of the Kingdom of God [see The Gospel of The Kingdom of God]: and the twelve were with Him."
"And certain women, which had been healed of evil spirits and infirmities, Mary called Magdalene [i.e. Mary of Magdala], out of whom went seven devils [see Casting Out Demons], And Joanna the wife of Chuza Herod's steward, and Susanna, and many others" (Luke 8:1-3 KJV)
Joanna and other women discovered the resurrection of the Christ (see Resurrections, also "I am not yet ascended") before the apostles did:
"Now upon the first day of the week, very early in the morning, they came unto the sepulchre [see The Sepulchre Of Christ], bringing the spices which they had prepared, and certain others with them. And they found the stone rolled away from the sepulchre. And they entered in, and found not the body of the Lord Jesus."
"And it came to pass, as they were much perplexed thereabout, behold, two men stood by them in shining garments: And as they were afraid, and bowed down their faces to the earth, they said unto them, Why seek ye the living among the dead? He is not here, but is risen: remember how He spake unto you when He was yet in Galilee, Saying, The Son of man must be delivered into the hands of sinful men, and be crucified, and the third day rise again."
"And they remembered his words, And returned from the sepulchre, and told all these things unto the eleven, and to all the rest. It was Mary Magdalene, and Joanna, and Mary the mother of James, and other women that were with them, which told these things unto the apostles." (Luke 24:1-10 KJV)
Fact Finder: "Anna" is a Greek form of a Hebrew name which means grace, or favor. Along with Joanna, other women of Bible History had variations of the name, e.g. Susanna. The term "hosanna" is also based upon a similar Hebrew meaning. How was "hosanna" originally used, and what did it mean?