Instead of Hope, how about Honor? Same first letter, nice meaning, 2 syllables? also, Sandra comes from Alexandra, so you could use any form of that (via Italian Allessandra) to commemorate your mom.
there are also variant forms: Sanda, Sandie, Sandreea, Sandrella, Sandrelle, Sandretta, Sandrette, Sandria, Sandrina, Sandrine, Sanndria, Saundra, Wysandria and Zandra.
For more information, see also related names Chrysantha, Deandra, Kassandra, Kendra, Shandra, Wysandra and Cassandra.
In addition, the following names have similar meanings to Hope:
Amala ... "Hope." ... [4]
Ashia ... "Life and hope." ...
Charity ... "and now abideth faith, hope, charity, these three; but the greatest of these is charity. See also Faith and Hope. [27]
Elpida ... "Hope."
Esperanza ... "Hope." ... [2]
Hope ... One of three names/qualities (Faith, Hope, Charity) described in the Bible at I Corinthians 13:13 ... Actress Hope Lange.
Nadia ... "Hope." ... [14]
Pandora ... followed by the one counterpart, Hope. [6]
Rainbow ... It is also seen as a symbol of hope and of ethnic and gender-preference tolerance ... [1]
Raja ... "Hope."
Speranza ... "Hope." [3]
Tikva ... "Hope." [1]
Verity ..