It's often found in the Bible and other historical texts, but it's rarely used in modern English.
Here are some examples of how "begat" is used:
* "Abraham begat Isaac, and Isaac begat Jacob." (Genesis 25:5)
* "He was begat by a man of wealth and power." (This sentence would be more common in historical fiction or a very formal style)
Today, we typically use words like "fathered", "gave birth to", or "produced" instead of "begat".