I recently received my DNA match from Ancestry,and I share 1,591 centimorgans across 53 segments with one and 1,773 centimorgans across 58 segments with another.
Could these people be half siblings?
Genealogy & Family History Stack Exchange is a question and answer site for expert genealogists and people interested in genealogy or family history. It only takes a minute to sign up.Sign up to join this community
On the strength of those matches the two people could also have one of these relationships to the person tested:
but perhaps these can be ruled out on what you know of your family's generations.