I was trying to determine which 3 members of the multi-member Isley Brothers were the 3 that were signed to Motown and recorded their numerous great songs on Motown.

Am I correct that Ron, Rudolph, and Kelly were the only 3 members of the Isley's that were signed and recorded for Motown?

There seems to be information that Ernie recorded for Motown, but I don't think that is true.

Too many books and articles on the Isley Brothers get the members mixed up when they say which were on this label, that label, etc. etc.