Here you will find family trees that maps out the relationships between characters in the series. Because there are so many inter-lapping trees within the one huge tree, the lines connection characters are colored differently to make sure that the trees don't get confused.
Key things to note:
Blue dot = boy
Pink dot = girl
a line that has two children coming off of one point (like the two children of the example tree far left) signifies that the children are twins. A single child coming out of a point (like the child on the far right of the tree) signifies a single birth. Children are also in order of Birth