Hello,
I found a copy of the original civil birth record for your William Condon, showing he was actually born in 1882 rather than 1883. I also found the civil birth records for his 7 siblings, as well as the church and civil marriage records for his parents, Michael Condon and Mary Butler. If you do not have these records I can send them to you after you reply that you would like these records.
Best Wishes,
Dave Boylan