How to spell GERTRAUD correctly?

If someone misspells "Gertraud", here are a few possible correct suggestions: Gertrude, Gertrud, Gertrudis, Gertruida.

• Bertrand Bertrand is a brilliant mathematician who has contributed significantly to the field of game theory.
• Gerrard Steven Gerrard is a legendary soccer player who captained Liverpool for many years.
• Gertrude Gertrude is my grandmother's first name.

Attenttion

• attention
• attentions
• attenuation
• inattention