Thank you for the info. I just located Dorothy's married name myself today, so it is good to have this confirmation from you.
I also came across a couple of interesting tidbits.
After Alexander Moir died, his widow, Katharina/Catherine/Cathie Hepting Moir brought their 2 daughters (Winifred Jamieson Moir and Katherine "Kitty" Hepting Moir) to Canada in 1912 and settled in Vancouver, British Columbia. The passenger list is now up on Ancestry. They were ticket number 68. Ticket number 67 is "Miss Hepting". Unfortunately, it gives no age or identifying info other than the fact that she was a typist. We were unaware that any of the Hepting girls came with them.
Frederick William Lambert Hepting was working at the shipyards in Glasgow in the early 1900's. In 1931, he traveled to South Africa - his occupation is listed as Surgeon. His age is listed as 31 and he is shown as single. I have not located any marriage records at this point.
Still no additional details on anyone named Athenia Hepting -- however, the ship that Alexander Moir's family came to Canada on was called the Athenia.