This is not possible with the Google Organizational Chart. Read the data format documentation.
A table with three columns of string rows, where each row represents a node in orgchart. Here are three columns:
Column 0 is the node identifier. It must be unique among all nodes and can include any characters, including spaces. This is shown on node. You can specify a formatted value to display on the chart instead, but an unformatted value is still used as an identifier.
Column 1 - [optional] ID of the parent node. This must be an unformatted value from column 0 of another row. Leave unspecified for the root node.
Column 2 - [optional] Tooltip text to display when the user hovers over this node.
Each node can have zero or one parent node, as well as zero or more child nodes.
You can create multiple trees, but they cannot be combined. (one of the node must have two parents or siblings).
Try using a different library:
... or maybe integrate with Geni
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