Baptism https://www.familysearch.org/ark:/61903/3:1:3QS7-L9Z5-PDWP?i=44&cc=...
Baptised as Willem Steynberg McDonald

Willem Steynberg McDonald - 21 January 1927 Casper McDonald; Elsie Magdalena Barnard

Maybe this Steynberg - is just a recording mistake though!?
I believe it should be Sternberg ( also sometimes recorded as Sterrenberg or Sternberg) - Thnx Wilma Basson

Also known as:
Personal Information Names : WILLEM STERNBERG Surname : MC DONALD Maiden Name : Date of Birth : 0027-01-21
https://www.gendatabase.com/family-finder-record.php?q=17148320&r=W...

Personal Information Full Names : WILLEM STERNBERG Surname : MC DONALD Maiden Name : Date of Birth : 0027-01-21 Identity Number : 2701215040081 Death Information Date of Death : 1978-03-00
https://www.gendatabase.com/deceased-record.php?q=17148320&r=WILLEM...

Marriage of Willem to Magdalena Petronella Scheepers in 1957 - his date of birth is given as 21-1-1927... witnessed by possibly his father, CN McDonald
https://www.familysearch.org/ark:/61903/3:1:3Q9M-CS27-8QW2-1?cc=282...
Willem Sterrenberg McDonald
Male
28 years
1927
Magdalena Petronella Scheepers
Female
18 years
1937
Marriage
2 July 1955
Naboomspruit, Potgietersrus, Transvaal, Suid-Afrika

I suspect there is something wrong with the placement of this profile?

Can you kindly help us re-check this Theunis? Thnx WB

'Wilma, agreed... he cannot be married to his mother!
I have not yet found a record of Magdalena having a son of this name, but she does have at least one grandson called Willem Sterrenberg McD, so perhaps this is where the profile fits (as the son of TG McD)
PH20220615'