When my son was born I gave him a hyphenated middle name. When he was a few month old he was called by his hyphenated middle name. When he started school. his teachers called him by his hyphenated middle name. When he was in middle school the school district policy changed. Students had to go by the first and last name on their birthday certificate. We did a legal name change. His hyphenated middle name became his first name and his first name became his middle name legally. We thought about doing the name change before but did not see a reason to do it. Until the school district policy change.

