__
__|__
_JOHN SWAN __________|
| | __
| |__|__
_WILLIAM SWAN _|
| | __
| | __|__
| |_MARGARET MCCROSSIN _|
| | __
| |__|__
|
|--Mary SWAN
|
| __
| __|__
| _ROBERT RUSSELL _____|
| | | __
| | |__|__
|_MARY RUSSELL _|
| __
| __|__
|_MARY ? _____________|
| __
|__|__