Eight (8) Singh's attested in the Great War:
Singh List
Name Date of Birth Rank Regimental number(s) Reference
1. SINGH, BUKAM 05/12/1893 454819 RG 150, Accession 1992-93/166, Box 8947 - 44
2. SINGH, HARI 06/06/1882 139181 RG 150, Accession 1992-93/166, Box 8947 - 45
3. SINGH, HERMAN 04/07/1888 827025 RG 150, Accession 1992-93/166, Box 8947 - 46
4. SINGH, JOHN 13/12/1880 721760 RG 150, Accession 1992-93/166, Box 8947 - 47
5. SINGH, LASHMAN 15/01/1885 219222 RG 150, Accession 1992-93/166, Box 8947 - 48
6. SINGH, RAM 03/12/1888 4080094 RG 150, Accession 1992-93/166, Box 8947 - 49
7. SINGH, SEWA 07/06/1890 2074282 RG 150, Accession 1992-93/166, Box 8947 - 50
8. SINGH, WARYAM 23/01/1883 410622 RG 150, Accession 1992-93/166, Box 8947 - 51
That matches Marc Leroux's program list, so that was the total. Any more names?