| Abbreviation | Definition |
|---|---|
| CATD | CENP A Targeting Domain |
| CCR | Calendar of Close Roles |
| CE | Common Era |
| CEM | Cemetery |
| cem. | cemetery |
| cens. | census |
| CENT | Century |
| Cert. | Certificate |
| Cert. | certified |
| CFR | Calendar of Fine Rolls |
| CG(C) | Certified Genealogist (Canada) |
| CGCC | Confucius Genealogy Compilation Committee |
| CGHL | Canadian Genealogy and History Links |
| CGI | Certified Genealogical Instructor |
| CGL | Certified Genealogical Lecturer |
| CH | CHurch or CHapel |
| Ch. | church |
| CHR | Christened on (date) |
| CIG | Computer Interest Group |
| CIGO | Council of Irish Genealogical Organizations |