Quoting_commentary for I Chronicles 25:13

הַשִּׁשִּׁ֣י בֻקִּיָּ֔הוּ בָּנָ֥יו וְאֶחָ֖יו שְׁנֵ֥ים עָשָֽׂר׃

The sixth to Bukkiah, his sons and his brethren, twelve;