| Abbreviation | Definition |
|---|---|
| rec | recorded a document |
| Rec. | record(ed) |
| rel | relict |
| ren | renounced |
| RES | RESided |
| res | residence/resided |
| Rev | The Reverend |
| s | son |
| S.J. | Suo Jure |
| s.j. | suo jure (in one's own right) |
| S/O | Son Of |
| SAH | Shared Ancestor Hints |
| SAR | Sons of the American Revolution |
| SB | StillBirth |
| SCGS | Southern California Genealogical Society |
| SGGS | Sacramento German Genealogy Society |
| sib. | sibling |
| sib. | sibling [sister or brother] |
| sibs | siblings |
| SIC | Sicut (Latin: thus, as written) |