Probably:
Civil Registration Indexes (Birth)

Lawrence Croft Hamer, reg. 1st quarter of 1903, Huddersfield, Yorkshire West Riding, England.
Lionel Capsey Hamer, reg. 2nd quarter of 1907, Ecclesall Bierlow, Yorkshire West Riding, England.

Leonard Hamer, reg. 1st quarter of 1908, Rotherham, Yorkshire West Riding, England.
Leonard Hamer, reg. 1st quarter of 1911, Hunslet, Yorkshire West Riding, England.
Lewis Hamer, reg. 4th quarter of 1911, Huddersfield, Yorkshire West Riding, England.
Lewis Hamer, reg. 1st quarter of 1912, North Bierley, Yorkshire West Riding, England.
Louie Hamer, reg. 2nd quarter of 1912, Halifax, Yorkshire West Riding, England.
Leonard Hamer, reg. 4th quarter of 1912, Halifax, Yorkshire West Riding, England.