Vincent's NT Word Studies
12. For. Explaining the whosoever of ver. 11.Difference. Better, as Rev., distinction. See on iii. 22.
Jew and Greek. On Greek, see on Acts vi. 1. Greeks here equivalent to Gentiles.
Lord (kuriov). See on Matt. xxi. 3. The reference is disputed: some Christ, others God. Probably Christ. See ver. 9, and compare Acts x. 36. The hearing which is necessary to believing comes through the word of Christ (ver. 17, where the reading is Christ instead of God).
That call upon (epikaloumenouv). See on appeal, Acts xxv. 11; James ii. 7. That invoke Him as, Lord: recalling vers. 9, 10. Compare Joel ii. 32.
Robertson's NT Word Studies
10:12 {Distinction} (diastol). See on this word #3:22. Here it is followed by the ablative case Ioudaiou te kai Hellnos (between Jew and Greek). {Lord of all} (kurios pantwn). See #Ga 3:28. {Rich} (ploutwn). Present active participle of ploutew. See #Eph 3:8 "the unsearchable riches of Christ."