| Skelly | a story-teller ... language of origin is Irish Gaelic and it is ... an uncommon baby boy name ... |
| Slater | roof slater ... language of origin is English and it is also ... not popular as a baby name for boys ... |
| Slavin | mountaineer ... mainly used in the English language and ... not regularly used as a baby name for ... |
| Sméagol | burrowing ... primarily used in the English language ... not frequently used as a baby boy ... |
| Smokey | smoke-colored ... has its origins in the English language ... not commonly used as a baby boy name ... |
| Snape | ... origin and use are both in the English language ... first name is derived from an English place ... |
| Sofiane | pure ... mainly used in the Arabic and French ... an unusual baby name for boys ... |
| Somerled | summer traveler ... used chiefly in Gaelic and Scottish, ... seldom used as a baby name for boys ... |
| Somerset | place of the summer settlers ... origin, as well as its use, is in the English ... |
| Sonam | fortunate one ... language of origin is Central Asian, and it is ... not regularly used as a baby name for ... |
| Sorley | a summer sailor; summer traveler ... of Old Norse and Irish Gaelic origin, ... variant form of Somerled ... |
| Soterios | salvation; savior ... a Greek name of Latin and Old Greek ... variant of Salvador ... |
| Souji | general director ... origin, as well as its use, is in the Japanese ... infrequently used as a baby name for ... |
| Souta | quick and thick ... origin and use are both in the Japanese ... a rarely used baby name for boys ... |
| Soutarou | robust eldest son ... origin, as well as its use, is in the Japanese ... not commonly used as a baby boy name ... |
| Spalding | people from Spald's territory ... origin is Old English, and its use, English ... |
| Sparky | giving off sparks ... language of origin is English and it is also ... an infrequently used baby name for ... |
| Spike | spike ... primarily used in English and it is also ... first name is derived from the common English ... |
| Spud | potato ... has its origins in the English language and ... not widely used as a baby name for boys ... |
| Spyridon | spirit ... of Latin origin ... used mainly in Greek and Russian ... not popular as a baby boy name ... |
