You can bring him any three of them. Please note that Jorgen's initial stats and class change depending on the items given, see Jorgen for a full list of the combinations.
Spoiler warning: This section may contain information that could spoil the story line or displays in depth quest or fight details.
Gossips (Balterossa's pub):
Bartender's Daughter: "Some amnesiac is wandering around the cities in the desert, looking for something that could regain his memory. That's the latest news, Daddy."
Bartender: "To lose all one's memories... how terrible. If my beloved daughter were to completely forget me, I don't know what I'd do... my life would be over!"
Bartender's Daughter: "Daddy, calm down!"
Jorgen: "You there - who are you? Do you know me? Do I know you? I know my name is Jorgen... but I don't know anything else. What sort of man was I? Where did I live? What was my job? What activities did I enjoy? I have no memory of any of it. Hmm? Your talisman, it... Ah, sorry. I thought you'd reminded me of something, but I guess not. Wait... This could be a good method. Ingenious, even. I'm fairly certain that asking you a favour at our first meeting seems somewhat rude, but I want to do whatever I can to regain my memory. Here is what I ask: could you find things that seems as if they could have some connection to me, and bring them here? I feel as if viewing them may trigger a memory. Even if I could have only one, I would be forever grateful."
Rush: "Be happy... memories suck."
Jorgen: "Perhaps... perhaps so. It's true that some have pasts they wish to forget so badly that my situation seems a boon. Forgive me for asking. I'll try to regain my memories by myself."
or:
Rush: "I'll see what I can do."
Jorgen: "I'll trust your intuition. if you can find me three things that really call to you about me, then please bring them to me, I'm sure it will help."
Jorgen (before we find things for him): "Did you find anything that could jog my memory yet? Or maybe three things, that would be good, yes. I'm sure just a little jog would help. I'm counting on you!"
Jorgen (when we're in possession of at least three things): "Oh, it's the one I remember again! You look like you have something for me - three somethings, even!"
Rush: "Nope, still looking!"
Jorgen: "Such dedication... I'll continue to do what I can on my end to regain my memory."
or:
Rush: "Yeah, here you go!"
Here starts the remembering. For different combinations check Jorgen.
Jorgen: "That..."
Rush: "That one's mine, dude."
Jorgen: "I guess you can't tell what's mine... If you can determine what is truly mine, then come back and tell me."
Jorgen: "Why... these boots are the same as the ones I'm wearing now. Just worn completely through... I must have made some incredible journeys in them!"
Jorgen: "Hm? This is my handwriting... This must be my journal! The pages are filled with formulas, and worn with use. To think I was so studious..."
Jorgen: "These three things... I can have them?"
Rush: "Mmm... no..."
or:
Rush: "Yup!"
Jorgen: "Yes... I remember! I... I was an adventurer, travelling the world to find my fortune. Once, when a treasure hunting in a deep cavern, I came across a mysterious insect. I fought it, thinking it was just another bug. Boy, was I wrong... It was a parasite, feeding off of memories. So it ate mine... and you know the rest. So that's who I am... Oh, I really should give you something... Ah, yes, take this. Thanks to your help, I've been able to remember how I've lived... how I come to where I am today. But the past is not everything... From now on, I must find how to live my present. That said, I believe it's well past time to get started. Thank you, Rush. Someday, may we meet again."