Tree Spirit. I've had a good hunt around the actual records but haven't found anything to definitively connect my Philippus to Josephus Maes & Maria van Creanenbroek. It would have been great to at least find something to indicate my Philippus was a “Philippus Jacobus” - the name recorded in that 1726 baptism.
As for Isabella Maas - being born in Sint Niklaas, married to Nicolaas de Bakker & Augustinus Weemans who were both bap witnesses to Phillipus' family, all strongly suggest she is my Phillipus' sister. I found her burial in Sint-Gillis-Waas in 1792 [“Isabella Francisca Maes, vrouw of Augustinus Weemaes”], but that record doesn't give any further info.
https://www.familysearch.org/ark:/61903/3:1:3Q9M-CSBY-TS82-D?i=656&cat=10289There seems a definite trend among this family to name a child after its baptism witness (rather than follow the grandparent-naming custom), and with this confirmation that Isabella (wife of de Bakker & Weemaes) was “Isabella Francisca”, it makes it even more likely that she was the Isabella Maes who witnessed the 1755 baptism of Philippus' first daughter (who was named Isabella Francisca).
Strange though that my Philippus seems to have dropped his baptismal “Jacobus”, and Isabella (baptism recorded as just “Isabella”) seems to have gained a “Francisca”.
That Tree on geni.com appears to be on the right track –
the 1720 marriage of Josephus Maes & Maria van Creanenbroek gives the witnesses as Petrus Maes and Joannes Baptist Maes (Josephus' brothers per that geni tree)
the 1722 baptism of Isabella Maes, dau of Josephus Maes & Maria van Creanenbroek, gives the witnesses as Jacobus Creanenbroek & Elisabeth de Jonge (Maria's brother and mother per that geni tree);
the 1726 baptism of Philippus Jacobus Maes, son of Josephus Maes & Maria van Creanenbroek, gives the witnesses as Philippus Jacobus de Wolf & Isabella [Brarh] (witnesses unknown; but another example of child having same name as a witness).
Anyway I'll keep plodding on. Glad to have had your help.
regards