beep, i think Bliss is a really adorable first name. are there any attributes, family members or sentimental things you want to honor with her middle name(s)? Do you want her middle to incorporate the M's from the last names? What kind of ancestry or cultures does your family represent?
I think all else being equal I'd like her middle name to have an M and/or an L somewhere in it, because of liking the sound of the repeated but not rhyming consonants.
We want her middle name to have some nice meaning or history to it, but don't have a particular family or sentimental person or concept to which we're attached. One we've considered is Ellen, which is similar to but not the same as my mom's name--a plus for me, but a minus for my husband, who really doesn't get along with my mom. The first name we've chosen has a lot of family history/significance, and she'll get one last name from each of us, so we don't feel like her middle has to be a family name.
My background is WASP American; in fact, on my side this baby will be a 13th generation American. Her dad was adopted from Korea by Scandinavian-Americans from the Midwest but doesn't feel strong connections to Sweden, Norway, or Korea at this point. Our first child has his dad's birth surname as a middle name, but unfortunately we don't really want to reuse that and DH's birth first and middle names are (a) boy names in Korea and (b) don't sound so good in English. We have thought of picking a Korean middle name, but since DH doesn't speak Korean and we don't really have connections to anyone who does, we didn't want to pick something at random off the internet without knowing the connotations or feeling very personally connected to the name. Our son is learning Chinese at school and I have many family members (Caucasian and several Chinese in-laws) who speak Chinese or live in China, so it would be easier to pick something Chinese--but we parents don't speak Chinese and wonder if it would be weird to bring in a Chinese name for a kid who will be half Asian but without a Chinese background.