Today we will look at the form राघवम् mAs from श्रीमद्-वाल्मीकि-रामायणम् 4.16.4.

सोढुं न च समर्थोऽहं युद्धकामस्य संयुगे । सुग्रीवस्य च संरम्भं हीनग्रीवस्य गर्जितम् ।। ४-१६-४ ।।
न च कार्यो विषादस्ते राघवं प्रति मत्कृते । धर्मज्ञश्च कृतज्ञश्च कथं पापं करिष्यति ।। ४-१६-५ ।।
निवर्तस्व सह स्त्रीभिः कथं भूयोऽनुगच्छसि । सौहृदं दर्शितं तारे मयि भक्तिः कृता त्वया ।। ४-१६-६ ।।
प्रतियोत्स्याम्यहं गत्वा सुग्रीवं जहि सम्भ्रमम् । दर्पं चास्य विनेष्यामि न च प्राणैर्वियोक्ष्यते ।। ४-१६-७ ।।

Gita Press translation – Nay, I am not able to tolerate the arrogance, much less the roar, of the weak-necked Sugrīva, who seeks an encounter on the battlefield (with me) (4). Nor should any anxiety be entertained by you from the side of Śrī Rāma on my account. How can Śrī Rāma – who knows what is right and cognizes his duty – perpetrate sin (in the form of killing one who is innocent)? (5) (Please) return with the (other) ladies. Why do you still follow me? Affection has been shown to such an extent and service rendered to me by you (6). Going out I shall give battle to Sugrīva; (pray) give up (all) perplexity. Nay, I shall take away his pride, yet he will not be rid of his life (7).

The above verses have previously appeared in the following post – सोढुम्-ind

रघोरपत्यम् (पुमान्) = राघवः – a (male) descendant of (the king) Raghu. Refers to Śrī Rāma.
In the verses the विवक्षा is द्वितीया-एकवचनम्, hence the form used is राघवम्।

(1) रघु ङस् + अण् । By 4-1-83 प्राग्दीव्यतोऽण् – The affix ‘अण्’ is hereby authorized as the default affix for all rules from here (4-1-83) down prior to the सूत्रम् 4-4-2 तेन दीव्यति खनति जयति जितम्। Note: The affix ‘अण्’ comes in by default in the section starting from 4-1-83 prior to 4-4-2.
As per the सूत्रम् 4-1-92 तस्यापत्यम् – Following a syntactically related पदम् in which the सन्धिः operations have been performed and which ends in a sixth case affix the तद्धिता: affixes already prescribed (by the prior rules 4-1-83 प्राग्दीव्यतोऽण् etc), as well as those that are going to be prescribed (by the following rules 4-1-95 अत इञ् etc), may be optionally applied to denote the sense of अपत्यम् (descendant.)
Note: The use of a तद्धित: affix is optional because a sentence or a compound may also be constructed to convey the same meaning. So for example – the तद्धित: form राघवः and the sentence रघोरपत्यम् and the compound रघ्वपत्यम् all convey the same meaning – a descendant of (the king) Raghu.

(2) रघु ङस् + अ । अनुबन्ध-लोपः by 1-3-3 हलन्त्यम्, 1-3-9 तस्य लोपः।

Note: ‘रघु ङस् + अ’ gets the designation प्रातिपदिकम्‌ by 1-2-46 कृत्तद्धितसमासाश्च। This allows 2-4-71 सुपो धातुप्रातिपदिकयोः to apply in the next step.

(3) रघु + अ । By 2-4-71 सुपो धातुप्रातिपदिकयोः – A सुँप् affix takes a लुक् elision when it is a part of a धातुः or a प्रातिपदिकम्।

Note: The affix ‘अण्’ is a णित् (has the letter ‘ण्’ as इत्)। This allows 7-2-117 तद्धितेष्वचामादेः to apply in the next step.

(4) राघु + अ । By 7-2-117 तद्धितेष्वचामादेः – The first vowel among the vowels of a अङ्गम् which is followed by a तद्धित: affix (ref. 4-1-76 तद्धिताः) which is either a ञित् (has the letter ‘ञ्’ as a इत्) or a णित् (has the letter ‘ण्’ as a इत्) takes the वृद्धि: (ref. 1-1-1 वृद्धिरादैच्) substitute.

Note: The अङ्गम् ‘राघु’ gets the भ-सञ्ज्ञा by 1-4-18 यचि भम्।

(5) राघो + अ । By 6-4-146 ओर्गुणः – When followed by a तद्धितः affix, the ending letter ‘उ’/’ऊ’ of a अङ्गम् which has the भ-सञ्ज्ञा (ref. 1-4-18 यचि भम्) takes the गुण: substitution (‘ओ’)।

(6) राघव । By 6-1-78 एचोऽयवायावः।

The प्रातिपदिकम् ‘राघव’ declines like राम-शब्दः।

(7) राघव + अम् । By 4-1-2 स्वौजसमौट्छष्टाभ्याम्भिस्ङेभ्याम्भ्यस्ङसिभ्याम्भ्यस्ङसोसाम्ङ्योस्सुप्‌।
Note: 1-3-4 न विभक्तौ तुस्माः prevents the ending letter ‘म्’ of the affix ‘अम्’ from getting इत्-सञ्ज्ञा।

(8) राघवम् । By 6-1-107 अमि पूर्वः – In place of a preceding अक् letter and the following vowel (अच्) belonging to the affix ‘अम्’ there is a single substitute of that preceding अक् letter.