DNA match

[Gavsmum]

I have a DNA match on Ancestry that I don't understand and can't trace.  It says this person is my half sister or 1st cousin and using other matches, I have found that it is on my mother's side.  This person doesn't have a tree on Ancestry so I can't look on that.  My mother didn't have any brothers or sisters so can only assume it is her child.  Is it possible that there is a mistake with this DNA match.

[jc26red]

Your mum doesn’t have any siblings that you or your mother know about. What about your father’s side of the family?

If the match doesn’t have a tree on ancestry, how do you know it’s on your mum’s side, have you compared matches with other maternal relatives?

[Gadget]

What is your shared cM and do you have any shared matches  with her who have trees.

[Rosinish]

My mother didn't have any brothers or sisters so can only assume it is her child.  Is it possible that there is a mistake with this DNA match.

As mentioned, there may have been a sibling unknown to others.

If there was an error with your DNA there wouldn't be a match with your maternal line.

Do you know any of the people she matches with in your tree?

How much research have you done i.e. have you followed direct lines only or have you branched out?

Have you looked for any births with your g/mothers' surname which may show illegitimacy with no maiden name showing?

It may be an idea to send a message to your match & ask if she can tell you the names of her parents &/or g/parents as you're interested in finding how you connect.

Her lack of a tree may suggest she was adopted possibly?


Annie

[Gavsmum]

Hi Annie
Thank you for your reply and I apologise for the delay in replying.

Yes, I have a 2nd cousin once removed that I have known all our lives who is also matched with this person so that is how I know this person is on my maternal side.  My Mum didn't know her father but I have done his family tree and obviously this person didn't come from his side or else my 2nd cousin wouldn't be a match.

I have done many branches of my tree over the years and I have also looked for a birth with my mothers maiden name but couldn't find anything.

Also this person's name could be her married name which makes things difficult.

Thanks again

Lindsey

[Gavsmum]

Hi Gadget.

Apologies for the delay in replying.  The cM is 1,618.

Lindsey

[Gavsmum]

Hi jc26red

Thank you for your reply and apologies for the delay in replying.  I have a shared match who I know is on my mother's side.

Lindsey

[Gadget]

Hi Gadget.

Apologies for the delay in replying.  The cM is 1,618.

Lindsey

Have you considered other relationships?

My niece and I share 1846 cMs.

See - https://dnapainter.com/tools/sharedcmv4


Gadget

Add - for your shared cMs, it  suggests

Grandparent Aunt / Uncle Half Sibling Niece / Nephew Grandchild 

[Gadget]

Further to my previous post~
 
Do you have any idea of the matches age?  This might help with the generational level.