अन्वयः

तेषाम् amongst all of them, ज्येष्ठ: eldest, राम: Rama, केतुरिव like flag, पितु: for his father भूय: exceedingly, रतिकर: causing pleasure, स्वयम्भूरिव like Brahma, भूतानाम् for all living beings, सम्मत:बभूव became highly respectable .

M N Dutt

Thus did he celebrate the natal rites of the princes. And among all those princes, the eldest, Rāma, like that of Ketu, (The ninth of the planets.) and the special delight of his father, became the object of general regard, even as the self-create Himself. And all of them were versed in the Vedas, and heroic, and intent upon the welfare of others.

Summary

Among them, Rama like the exalted flag, became dear to his father like Brahma he was highly respected by all living beings.

पदच्छेदः

तेषां	तद् (६.३)
केतुर्	केतु (१.१)
इव	इव (अव्ययः)
ज्येष्ठो	ज्येष्ठ (१.१)
रामो	राम (१.१)
रतिकरः	रति–कर (१.१)
पितुः	पितृ (६.१)
बभूव	बभूव (√भू लिट् प्र.पु. एक.)
भूयो	भूयस् (अव्ययः)
भूतानां	भूत (६.३)
स्वयम्भूर्	स्वयम्भु (१.१)
इव	इव (अव्ययः)
संमतः	संमत (√सम्-मन् + क्त, १.१)

छन्दः

अनुष्टुप् [८]

छन्दोविश्लेषणम्

१	२	३	४	५	६	७	८
ते	षां	के	तु	रि	व	ज्ये	ष्ठो
रा	मो	र	ति	क	रः	पि	तुः
ब	भू	व	भू	यो	भू	ता	नां
स्व	य	म्भू	रि	व	सं	म	तः