Known relationships within the Shining Series are covered below. Note that any blatantly obvious, and less interesting relationships (such as Anri being the daughter of King Guardiana etc) have not been included. This page primarily covers cross-game relationships and the more intricately detailed relationships of Shining Force III.
Darksol and Mishaela (Shining Force, Shining Force Gaiden Final Conflict) are the parents of Mephisto, aka Dark Sol, aka Melvyl from Shining and the Darkness. The evidence for this is found in Final Conflict, though Mishaela's role is only implied it is clear from her loyalty to Darksol and her concern for Mephisto that she is indeed the mother.
Though it's not certain, it seems likely that Ian could be the father of Bowie (Shining Force II). We only encounter Bowie's mother in the game, but Ian did end up on Grans Island at the end of Final Conflict and Bowie's hair colour is a mix between his mother's and Ian's.
In Shining Force CD we are told that Sig is the nephew of Gong (Shining Force).
We know nothing about Gong's sibling(s), or Sig's parents, so this tree is a little empty. It would be nice to think that Knuckles (Final Conflict) fits in here somewhere because of his similar appearance, but I doubt that he does.
Hawel is an old man in Shining Force II, and it is assumed that his wife has already passed on. While we can't be sure who she was, some might like to imagine it was Sonette (Final Conflict) who seemed to be quite friendly with the mage.
Though we know nothing of his mother, I wonder if that cheeky look about him and bright hair have anything to do with Diane (Shining Force).
In Shining Force CD we meet Apis, who is the only son of Ken (Shining Force, Shining Force CD).
Though we know nothing of his mother, the only female centaur in Shining Force was Mae, so it's possible that she's the one.
His mother is an absolute mystery, and I for one don't recall seeing any female dwarves in Shining Force!
Though we know very little of Julian's (Shining Force III) parents, I've included him because of the crossover with Shining the Holy Ark in which we learn of his father's disappearance at Galm's mansion.
Though his mother is never mentioned by name, we know his father's name was James.
As you can see, her father is Governer-General Garvin (Shining Force III), who appears to have become involved with a female Vandal descended from Bulzome himself.
Garosh (Shining Force III) is the brother of Jade (Shining Force III Scenario 2). Nothing is known of their parents.