I am afraid that I have found it impossible to replicate your search.
There are four Minnie Adas in the statutory birth records, five in the marriages index and seven in the deaths index.
Searches for Minniada and Minnieada produce no results in the statutory birth, marriage or death indexes.
The birth index lists Minnie Ada S N Cowan, born 1903 in Glasgow Anderston. Minnie Ada Shepherd Cowan, other surname Marshall, mother's surname Angus, died in Glasgow in 1978 aged 74.
A search for Minnie Ada in 1929 in the deaths index produces no results. A search for Minn* in the deaths index in 1929, born 1903 plus or minus three years, produces two results, a Minnie Robertson Munro or Murphy and a Minnie Hamilton Wilson or Muir.