Hello Tiger Lily,
There may be more than these two methods of approach regarding orphans and adoption -
A. No living parents and no living relatives. Adopted from an orphanage.
B. No living parents but brought into the family circle of living relatives and adopted by them.
Somehow or other these questions require answers
1. Where did Alexander marry Maggie ?
2. What religion were Alexander and Maggie.
3. When did Alexander die ?
4. Where did Alexander die ?
5. Why is this posted in Co. Down ?
6. Was Peoples his birth name or adopted name ?
7. In which of the services did Alexander serve in WWII ? His name should appear on record.
I think there was an upper age limit after which men could not enter the services in WWII
This URL may be a little bit of help
http://scripts.ireland.com/ancestor/surname/index.cfm Surname Search