How reliable is My Heritage theory of family relativity

[Mhillbilly]

Hi all
 Some help please with a question on the theory of family relativity in My Heritage

I have been researching my GG grandfather Rowland White 1851 death unknown for sometime

The complication with Rowland is that he was married under a different name in 1877, was in the 1881 census and then does not appear anywhere else

I have a number of DNA cousins from my GG grandmothers line within ancestry which is where I tested. However at that site I have no White DNA cousins above Rowland to confirm Rowland is actually my genetic ancestor.

I have added my ancestry test to My Heritage and discovered a number of other DNA cousins the majority of which link well with my ancestry results.
I have more than one theory of family relativity results on other branches of my tree.

The good news is that I have two matches at 5th cousin level which I can trace to my GGGG grandfather William Green b 1805 as the MRCA.  That is Rowlands grandfather.
The matches both appear as Theory of family relativity matches and descend from different children of my GGGG grandfather.  One match is 22cM and the other is 20cM
The shared matches of these two did not add anything, all being of approximately the same values, 4 5th cousin range.

Is this a good enough match to say I am genetically descended fro William Green and hence Rowland is my GG grandfather

Thanks for any advice

[Glen in Tinsel Kni]

Some swear by them, some swear at them. I'm so far into the latter group I deleted my tree so no more are created. If you choose to reject a ToFR it still remains and can be 'undone' and accepted at a later date. There isn't (as far as I'm aware), an option to completely delete a prediction as any prior to my tree removal are still visible but no new theories have appeared.   

Remember the theories use multiple trees including non dna matches and not just the tree of a match,   records from their database and dna.

[Biggles50]

I am in the same camp as Glen.

I suggest treating anything from My Heritage with caution.

Especially at low cM levels and even more so in communities with limited gene pools as Pedigree Collapse can skew results.

[Mhillbilly]

Thanks for the comments and I appreciate the need to treat any 'hints' based on other peoples genealogical research with caution

My question was about the level of the DNA match as with 4th great grandfather as MRCA 5th cousin is the most likely match

in this case I have researched my tree and am comfortable with the genealogical facts my question was on the DNA results

 Of course, the greater the cM the greater the certainty but what about 5th cousins matches at 22 and 20cM?

 

[Biggles50]

20 & 22cM are right in the relationship ball park so in the absense of further information I suggest running with them.

What I would do is to include them in my Tree but in each I would add a Custom Fact explaining the reasoning.

Additionally I would add an image of a “?” in the Profile of each match and in their lines up to the MRCA.

The “?” Will give a reminder to check from time to time and do use all the avilable genealogy searching sites to gather as much info as you cn on the people in the matches lines.

I would also look at shared matches and how they link into the family.

my Heritage’s chromosome browser can come in handy so do take a look at it and export what you can.