This interactive family tree visualization displays hierarchical relationships using a node-link diagram with expandable and collapsible branches. The D3.js v3 layout algorithm arranges nodes vertically by depth, with color-coded node types and labeled links showing connection directions. Users can click nodes to toggle child visibility, with smooth 750ms animated transitions. The visualization supports pan and zoom through D3's zoom behavior, while tooltips provide additional node information. The tree structure comes from a JSON data file loaded via d3.json, with SVG rendering for all graphical elements including custom arrow markers and drop shadows.