This example presents a three-generation family tree as a static SVG visualization using D3.js v6. It shows a root "Grandparents" node branching into two parent nodes, each with two child nodes. The layout is computed with `d3.stratify()` and `d3.tree()`, while `d3.linkVertical()` draws the connecting paths. Node shapes and colors encode generation depth: squares represent the root, circles represent parents, and triangles represent children. A legend explains the mapping, and each node includes a tooltip via a `<title>` element.