| Sabra |
| Sade |
| Sahitya-Darpana |
| Saint Martin |
| Saint-Martin |
| Saint-Victor |
| SAKUMA |
| SALLUST |
| Salmon |
| SALOME |
| Samkara |
| Samtanantarasiddhi |
| Sandesara |
| Sandkühler |
| Sangam |
| Sankara |
| Sankaracarya |
| Sankaracharya |
| Sanskrit |
| Sanskrit / Tamil |
| Sanskrit/Tamil |
| Santayana |
| Saraiva |
| Sarasvatibhayana-Granthamala |
| Saraswati |
| Sarma |
| SARTRE |
| Sassen |
| Sasso |
| Sastri |
| Sastry |
| Satchidanandendra |
| Saundaryalahari |
| SAUSSURE |
| Sauvagnargues |
| Sayre |
| Scaliger |
| Schade |
| Schaff |
| Schaffer |
| Schapiro |
| SCHARF |
| scheepers |
| SCHEFFLER |
| Scheler |
| Schelling |
| Scherliess |
| Schilfgaarde |
| Schimmel |
| Schipper |
| Schlegel |
| Schleichert |
| Schleiermacher |
| Schmidt |
| Schmithausen |
| Schmitz |
| Schneider |
| Schoenberg |
| Scholarios |
| Schopenhauer |
| Schrader |
| Schreiber |
| Schroeder |
| Schröter |
| Schuhmann |
| Schulte |
| Schulz |
| Schutz |
| Schwarz |
| Schwarzschild |
| Schweitzer |
| Sciama |
| Scot |
| SCRUTON |
| Séailles |
| Seaton |
| Seerveld |
| Seiichi Makino and Michio Tsutsui |
| Seligman |
| Sellars |
| Sells |
| Seminar |
| Senelick |
| Senne |
| Sepp |
| Sergeyevich - Yesenin-Volpin |
| SETTON |
| Shah |
| SHAKESPEARE |
| Shaner |
| Shantaraksita |
| Shapere |
| Sharma |
| Shastri |
| Shastri, M. A. |
| SHAW |
| Sheldon-Williams |
| Shepard |
| Sherrington |
| Shetter |
| Shih ( Suh Hu ) |
| Shikibu |
| Shinnie |
| Shinshoji |
| Shirazi |
| SHIZUTERU |
| Siauve |
| Siddhantashastree |
| Siddhi |
| Sidney |
| Siebelink |
| Siena |
| Sierksma |
| Silburn |
| Silesius |
| Silver |
| Simeon the New Theologian |
| Simmel |
| Singh |
| Sinha |
| Sinkewicz |
| Siva |
| Sivajnanasiddhiyar |
| Sivananda |
| Sivaraman |
| SJKLOVSKI |
| Sjöholm |
| Skolem |
| Skolimowski |
| Slimovic |
| Slooten |
| Smart |
| Smith |
| SNELL |
| Snellgrove |
| Söderberg |
| Soenen |
| Sokolowski |
| SOLLERS |
| Solzenjicin |
| SOLZHENITSYN |
| Son |
| SONTAG |
| Soothill |
| Sorensen |
| Sörensen, Ph. D. |
| Souche-Dagues |
| Soucy |
| Souriau |
| Speijer |
| SPENCER |
| Spengler |
| Spiegelberg |
| Spinoza |
| Spiteris |
| Spitzbardt |
| Sprague |
| Spruijt |
| Srimadbhagavadgita |
| Srinivasacarya |
| Srinivasachari |
| SRINIVASADASA |
| Srinivasan |
| Srivatsankacharyar |
| Staal |
| Stanford |
| Stanguennec |
| Stanislavsky |
| Stankovic |
| Stapf |
| Starkie |
| Starobinski |
| Stcherbatsky |
| Steegmuller |
| Steere |
| Stegmüller |
| Stein |
| Steinbeck |
| STEINBOCK |
| STEINER |
| Steinkellner |
| Stenlund |
| Stenzler |
| Stéthatos |
| Stevens |
| Stojanovic |
| Stolzenberg |
| STRAATEN |
| Straus |
| Stravinsky |
| Strawson |
| STRINDBERG |
| Strohm |
| SUCHLA |
| Suchtelen |
| Sukla |
| Sullivan |
| Sumerian Art |
| Suppes |
| Suresvara |
| Suresvaracarya |
| Suso |
| Sutra |
| Suzuki |
| Svitak |
| Svoboda |
| Swaan |
| Swain |
| Swann |
| Swingewood |
| Symbolic Logic |
| Symeon - Le Nouveau Théologien |
| Symeon - The New Theologian |
| Symeon Le Nouveau Thélogien |
| Symeon Le Nouveau Théologien |
| Syrian |
| SZONDI |