Hi and welcome to Rootschat
Are the family on the 1910 census? Any additional info re: birthyear/birthplace?
I found this entry on the IGI at
www.familysearch.org and as it is closer to Jane's birthyear you may want to bear it in mind
JOHN SANDYS Birth: 11 NOV 1864 Dublin
Father JOSEPH SANDYS Mother BRIDGET HENESY
You may want to consider posting a request for a lookup on the 1901 Irish census for a Sands/Sandys with that profile because if he is found to be still in Ireland then you can eliminate him as a possible
Would John & Jane's American death certs give details of their parents?
Another possibility is to try and trace their son's birth in Ireland to get details of Jane's maiden name