SANDERS: Middle English for "Alexander's son." Relatives: Sander, Sandor, Sandy, Sands, Sanderson, Saunders, Saunderson. Namesakes: Sander Vanocur, Sandy Richardson, Tommy Sands, George Sanders, George Sand.
SANDRA: A form of Alexandra. Sandra was in the top twenty in the fifties -- perhaps because of the matinee heroine Sandra Dee. Relatives: Sondra, Sandie, Sandy, Sandee. Namesakes: Sandra Day O'Connor, Sandy Duncan.
SANFORD: Old English for "dweller at the sandy ford." Relatives: Sanborn, Sandy, Sandford. Namesakes: Georg Sanford Brown, Mount Sanford, Chase and Sanborn coffee.
SAPPHIRA: From the Greek for the jewel and the color. Sapphire, the blue gem, is the birthstone for September babies. Relatives: Saphira, Sapphire. Namesake: Sapphira and the Slave Girl.
SARAH: From the Hebrew for "princess." This biblical name has always been popular and deservedly so. It blends beautifully with other names. Relatives: Sara, Sari, Sarene, Sarai, Sarina, Sarine, Sarita, Sairne, Sarett, Salaidh, Sally, Sallye, Salli, Sallie, Sal, Sadie, Sadey, Zarah, Zara, Zaria. Namesakes: wife of Abraham, Sarah Bernhardt, Sara Teasdale, Sally Jessie Raphael, Zara Phillips (daughter of Princess Anne).
SARGENT: From the Old French for "officer." For the hierarchy-conscious child, first take a look at Major. Relatives: Sargeant, Sergent, Sarge. Namesake: Sargent Shriver.
SAUL: From the Hebrew for "asked for." Saul hasn't been able to compete with the more popular Samuel but has held its own since biblical times. Relatives: Sol, Sauly, Solly. Namesakes: King Saul, Saul Steinberg, Saul Bellow.