| Name | Sister McElwyn II (US) |
| YoB | 1929 |
| Sex | mare |
| Colour | |
| Sire | Mr McElwyn (US), 1921 |
| Dam | Hazel Peter (US), 1921 |
| Damsire | Peter the Great (US), 1895 |
| Breeder | |
| Birthplace |
| Colour | Gender | Pedigree | Breeder | ||
|---|---|---|---|---|---|
| 1947 | Mother's Song (US) | bay | mare | Gay Song (US), 1937 - Sister McElwyn II (US), 1929 | H. K. Bealey |