Is it established that the names of the two angels are Munkar and Nakir?
Machine translationRead the Arabic original
Answer : No, this is reported in the Sunan, not in the two Sahihs. Some scholars of knowledge denied it, and some scholars of knowledge affirmed it.
Source
قناة «فضيلة الشيخ محمد بن صالح العثيمين»، 1240 - 4600 هل ثبت أن اسم الملكين منكر ونكير؟ ابن عثيمين — youtube.com
The Arabic text is a machine transcription of the audio recording.