Adding trainee for Willebrord Snell van Royen (Snellius)
Type a name and select match from the drop-down list. If no match exists, you will be prompted to add a new person to the tree.
Adding mentor for Willebrord Snell van Royen (Snellius)
Type a name and select match from the drop-down list. If no match exists, you will be prompted to add a new person to the tree.
