Lazarus Roberts married Mary Fooks at Weymouth on 6 March 1823. Their children were:
1. James Mackenzie Roberts, born 1824
2. William Pollard Roberts, born 1826
3. Henry Came Roberts, born 1828
4. Charles Dunrich Roberts, born 1829
5. Felix Delaney Roberts, born 1831
6. Arthur Pilch Roberts, born 1832
7. Felix Delaney Roberts (II), born 1834
8. Mary Mackenzie Roberts, born 1836
9. Ellen Fanny Roberts, born 1838
10. Catherine Anne Roberts, born 1839
11. Alfred George Roberts, born 1841
12. Edward Parrey Roberts, born 1843