Ober-Monjou, Volga Map #6 E-2
- Clues 1981, Part 1, P. 80, 81
- Clues 1981, Part 2, P. 27
- Clues 1982, Part 1, P. 90
- Journal, V. 1 #3, P. 71
- Work Paper, #9, P. 60, 62
- Work Paper, #10, P. 51, 52
- Work Paper, #14, P. 55
- Work Paper, #17, P. 61
- Work Paper, #23, P. 80
- Work Paper, #24, P. 80
Oberdorf, Volga Map #6 B-7
- Clues 1981, Part 2, P. 38
- Clues 1982, Part 1, P. 86, 87
- Clues 1982, Part 2, P. 30
- Clues 1983, Part 2, P. 41
- Clues 1984, Part 1, P. 96
- Clues 1988, Part 2, P. 51
- Clues 1990, P. 86
Obiskavitz ?
- Clues 1994, P.104
Odessa Map #2
- Clues 1981, Part 1, P. 79
- Clues 1982, Part 1, P. 85
- Clues 1982, Part 2, P. 26
- Clues 1983, Part 2, P. 41
- Clues 1987, Part 2, P. 28, 29
- Clues 1988, Part 1, P. 78
- Clues 1990, P. 85, 87, 89, 93
- Clues 1991, P. 98, 100, 101
- Clues 1993, P. 101, 104, 105, 108
- Clues 1994, P. 101-105, 107-108
- Clues 1995, P. 78, 81
- Clues 1996, Part 1, P. 77, 78, 79
- Heritage Review, #12, P. 43, 44
- Heritage Review, #15, P. 15, 17
- Heritage Review, #17, P. 55, 59
- Heritage Review, #25, P. 37
- Heritage Review, V. 10 #3, P. 43
- Heritage Review, V. 14 #1, P. 14
- Heritage Review, V. 18 #2, P. 37
Odessa District Map #2
- Heritage Review, #12, P. 43
- Heritage Review, #17, P. 59, 61
- Heritage Review, #25, P. 39
- Work Paper, #9, P. 59
- Work Paper, #13, P. 51
- Work Paper, #24, P. 80
Olendorf
- Clues 1995, P. 82
Oleschna / Oleshna (See Also Dietel)
- Work Paper, #20, P. 79
Olesk
- Clues 1991, P. 100, 104
Oleszena
- Work Paper, #20, P. 77
Olschany
- Heritage Review, V. 19 #4, P. 9
Omaat
- Clues 1991, P. 96
Omsk
- Clues 1981, Part 2, P. 33
- Clues 1989, P. 97
Oneschl
- Clues 1981, Part 1, P. 84
Orbach (See Also Urbach)
- Clues 1990, P. 90
- Work Paper, #14, P. 55
Ordelice, Yugoslavia
- Clues 1991, P. 110
Orenburg
- Clues 1986, Part 1, P. 77
- Heritage Review, V. 21 #4, P. 17
Orlamskae
- Clues 1984, Part 2, P. 32
Orlan / Orlen, East Prussia ?
- Clues 1989, P. 101
Orlov, Volga Map #6 E-1
- Clues 1984, Part 1, P. 99
Orlovskoye, Volga Map #6 E-1
- Clues 1981, Part 1, P. 87
- Clues 1983, Part 1, P. 97
- Clues 1984, Part 1, P. 98
- Clues 1991, P. 96
Ortidorf, Romania
- Clues 1992, P. 108
Osarka
- Clues 1986, Part 2, P.11
Oseruvo
- Heritage Review, V. 22 #3, P. 31
Osikof ?
- Clues 1982, Part 1, P. 91
Ostertag
- Clues 1981, Part 1, P. 83
- Clues 1982, Part 2, P. 23
- Heritage Review, #24, P. 37
- Journal, V. 1 #3, P. 72
Ostrakofska
- Work Paper, #9, P. 62
Ostrog
- Clues 1984, Part 1, P. 96
- Clues 1988, Part 1, P. 76
- Clues 1988, Part 2, P. 22
Ostrovoszczina, Polish Volhynia
- Clues 1989, P. 99
Ostrov / Ostrow
- Clues 1986, Part 2, P. 11
- Clues 1995, P. 76
Ostuczyn, Volhynia
- Clues 1989, P. 97
Ozmiany ?
- Clues 1981, Part 2, P. 28