This example shows a family tree for Elrond Half-elven, using a tree layout with circular nodes whose sizes correspond to each individual’s value. It uses D3 v7’s `d3.tree` and `d3.hierarchy` to structure the data, then renders the hierarchy as an SVG with curved links and colored nodes. Node text labels are positioned based on whether the node has children, with styling driven by the data’s `level` and `type` properties.