James and Helen had the following children:
 | William Mercer |
| Laurence Mercer |
| John Mercer
Spouse: ____? Kennavie.
Children:
 | David Mercer (b:1648) |
|
| James Mercer (Burgess of Perth. Colonel.)
Spouse: Jean Mercer. (This marriage should not
be confused with that of James
Mercer (son of William
Mercer and Anne Rollo) and Jean
Mercer
(daughter of William
Mercer and Isobell Gaitts.) This
Jean Mercer may have been the daughter of Robert Mercer and Rebecca
(or Rachael) Carmichael. She is the only other person we know of,
of this name and suitable age (b:1606), whose husband has not been
identified. We do not know for sure. There were a number of marriages
between cousins, presumably as they served to keep property within the
extended family.)
Children:
| William Mercer (b:1654) |
| Helen Mercer (Her father's executrix.) |
|
| Robert Mercer |
| Helen Mercer
Spouse 1: James Crichton.
Spouse 2: Hon. Andrew Rollo, Minister of Dunning. |
| Margaret Mercer
Spouse: Laurence Craigie of Kilgraston. |
|
