1:19a

This became known to all who lived in Jerusalem: This clause is passive. Here are some other ways to translate this clause:

Everyone in Jerusalem heard about this (New International Version)
-or-
The news of his death spread to all the people of Jerusalem (New Living Translation (2004))

1:19b

so they called that field in their own language: The word their refers to the people in Jerusalem. They were Jews and at that time usually spoke Aramaic.

1:19c

that is: This phrase indicates that the phrase “Field of Blood” explains the name Akeldama. Here are some other ways to translate this phrase:

which means (Good News Translation)
-or-
that is to say (King James Version)

Field of Blood: People probably called that place Field of Blood because Judas killed himself there and his blood flowed out. Here are some other ways to translate this phrase:

Ground/Area of Blood ⌊Spilt⌋
-or-
Blood ⌊poured out⌋ Field/Land
-or-
field where someone’s blood flowed out

General Comment on 1:18a–19c

1:18a–19c was extra information. You should indicate at the end of 1:19c that the extra information has ended. The Berean Standard Bible does so by using a closing parenthesis “)”, beginning a new paragraph at 1:20 that continues Peter’s speech.

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