Yes, well, I would like to point out to you that any children born of his wife would have been legitimate. It is unfortunate that the terms "bastard" and "illegitimate" are thrown around so very carelessly in this context. "Illegitimate" is a precise legal term. By law in most countries, the issue of a wife in a marriage is by definition legitimate. None of Mignon's children born during her marriage could be illegitimate in a legal sense, and that is where the term would apply. Some countries provide the presumed father a means of challenging this legitimacy, but even today, it is not commonly used.
I believe you are speculating that Tomi could have been biologically fathered by someone other than Alexander, but even that would not have made him illegitimate. And, I respectfully request that if you must use this term on this part of the forum that you clearly mark such use as speculation or gossip.