Maria Dorothea Smuts Doubell, c18 - Two Maria Dorothea Doubell Smutses – Cousins or Mother & Daughter?

Two Maria Dorothea Doubell Smutses – Cousins or Mother & Daughter?

1) For Maria Dorothea Doubell (1860 - 1902) - we have baptism sources showing her as the daughter of Wessel Michiel Smuts & Mary Ann Smuts (1844 - 1902); and her death docs name a Walter David Peter Doubell as her husband: Presumably this one: Walter David Peter Doubell, c4 (1861 - 1950) (who, as a widower, got a special licence to marry Maria's sister Charlotte Smuts in 1903)

2) Maria Dorothea Smuts Gray Cary, c19 (c 1882 - )(not mentioned in SAG - who, however, leave off half of the children of Walter & Esther Doubell anyway), but cited here http://www.mytrees.com/ancestry/Other/Born-1878/Do/Doubell-family/C... (if anybody can get in to check the doc that would be great!) as the 14th child of Walter David Peter Doubell, b2 (c1830 -) & Hesther Arabella Doubell (- 1906)

As the two mothers (Mary Ann Smuts (1844 - 1902) & Hesther Arabella Doubell (- 1906) ) were sisters:
That would mean that the two Maria Dorothea Smuts Doubells were cousins – even though born about 20 yrs apart, and 1) with Smuts as a Maiden Name & Doubell as a Married Name, & 2) with Smuts as a middle name, & Doubell as a Maiden Name.

(A further complexity is introduced by the fact that the two sisters’ (Mary Ann Smuts (1844 - 1902) & Hesther Arabella Doubell (- 1906) kids married each other. So, Maria Dorothea Doubell (1860 - 1902) marries, in c1882 Maria Dorothea Smuts Gray Cary, c19 (c 1882 -)’s much older brother: Walter David Peter Doubell, c4 (1861 - 1950). Does her mother in law/Aunt Hesther Arabella Doubell (- 1906) name the child born at the time of the wedding after her new daughter in law/ niece (including in its middle name, her daughter in law/neice’s Maiden name)? Implausible, except that these sisters obviously had somewhat of a fascination with incestuous connections

OR is the baby namesake actually the child of the new daughter in law – hence being given her name. The Walter David Peter who is her father is then Walter David Peter Doubell, c4 (1861 – 1950) (now positioned as her much older brother).
I think this is more likely altogether: Depending on what the birth/baptism doc on http://www.mytrees.com/ancestry/Other/Born-1878/Do/Doubell-family/C... gives for her mother’s name – I would suggest the younger Maria Dorothea’s present position on the tree as Esther & Walter (1834)’s daughter, not Maria & Walter(1861)’s daughter is simply an error caused by the cousin marriages & crossover of names; or she is an out of wedlock child with her grandparents’ names on her birth certificate – but her mother’s Maiden name inserted into her middle name as a marker.