I-130 | Birth certificate mothers name aren't exactly same, how to proceed?

[lance]

Context:

1. I am a US citizen and applying for my brothers green card thru F4 category.
2. As evidence, I-130 form is requesting my and my brothers birth certificate.

Issue:

1. My birth certificate has mothers name as: Mary Peter Boman
2. My brother's birth certificate has mothers name as: Mary.

Note:

1. Fathers name on both birth certificates match on both birth certificates: John Peter Boman

Question:

1. Given the mother name on my birth certificate (Mary Peter Boman) doesnt exactly match my brothers birth certificate (Mary), would this cause a problem to establish sibling relationship?
2. Besides birth certificate, is there any other document to provide to establish sibling relationship.

Images:

1. My redacted birth certificate: https://imgur.com/OgnIoqX
2. My brothers redacted birth certificate: https://imgur.com/6r4NjdS