Name in offspring earning list (1875 Turf Register) is fully spelled format as "JOHN C. Breckenridge". Elsewhere just "J. C.". Latter inconsistencies also in 1880-1881 Krik's Guide. Frequently shown in his progeny's racing record simply as BRECKENRIDGE. Also spelled with "I" instead of "E" - BreckInridge (the proper spelling of the Confederate general).